Merge branch 'v2' of github.com:tomav/docker-mailserver into v2

2024-01-19 02:48:50 +00:00 · 2016-04-11 22:09:12 +02:00 · 2016-04-11 22:09:12 +02:00 · ad5536057a
parent c1cc865a0b 69b7bb3128
commit ad5536057a
49 changed files with 3128 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,5 @@
+.DS_Store
+docker-compose.yml
+postfix/ssl/*
+letsencrypt/
+.idea
--- a/.travis.yml
+++ b/.travis.yml
@ -0,0 +1,6 @@
+language: bash
+sudo: required
+services:
+  - docker
+script:
+  - make all
--- a/69
+++ b/69
@ -0,0 +1,69 @@
+FROM ubuntu:14.04
+MAINTAINER Thomas VIAL
+
+# Packages
+RUN apt-get update -q --fix-missing
+RUN apt-get -y upgrade
+RUN DEBIAN_FRONTEND=noninteractive apt-get -y install vim postfix dovecot-core dovecot-imapd dovecot-pop3d \
+    supervisor gamin amavisd-new spamassassin clamav clamav-daemon libnet-dns-perl libmail-spf-perl \
+    pyzor razor arj bzip2 cabextract cpio file gzip nomarch p7zip pax unzip zip zoo rsyslog mailutils netcat \
+    opendkim opendkim-tools opendmarc curl fail2ban
+RUN apt-get autoclean && rm -rf /var/lib/apt/lists/*
+
+# Configures Dovecot
+RUN sed -i -e 's/include_try \/usr\/share\/dovecot\/protocols\.d/include_try \/etc\/dovecot\/protocols\.d/g' /etc/dovecot/dovecot.conf
+ADD dovecot/auth-passwdfile.inc /etc/dovecot/conf.d/
+ADD dovecot/10-*.conf /etc/dovecot/conf.d/
+
+# Enables Spamassassin and CRON updates
+RUN sed -i -r 's/^(CRON|ENABLED)=0/\1=1/g' /etc/default/spamassassin
+
+# Enables Amavis
+RUN sed -i -r 's/#(@|   \\%)bypass/\1bypass/g' /etc/amavis/conf.d/15-content_filter_mode
+RUN adduser clamav amavis
+RUN adduser amavis clamav
+RUN useradd -u 5000 -d /home/docker -s /bin/bash -p $(echo docker | openssl passwd -1 -stdin) docker
+
+# Enables Clamav
+RUN chmod 644 /etc/clamav/freshclam.conf
+RUN (crontab -l ; echo "0 1 * * * /usr/bin/freshclam --quiet") | sort - | uniq - | crontab -
+RUN freshclam
+
+# Configure DKIM (opendkim)
+RUN mkdir -p /etc/opendkim/keys
+ADD postfix/TrustedHosts /etc/opendkim/TrustedHosts
+# DKIM config files
+ADD postfix/opendkim.conf /etc/opendkim.conf
+ADD postfix/default-opendkim /etc/default/opendkim
+
+# Configure DMARC (opendmarc)
+ADD postfix/opendmarc.conf /etc/opendmarc.conf
+ADD postfix/default-opendmarc /etc/default/opendmarc
+
+# Configures Postfix
+ADD postfix/main.cf /etc/postfix/main.cf
+ADD postfix/master.cf /etc/postfix/master.cf
+ADD bin/generate-ssl-certificate /usr/local/bin/generate-ssl-certificate
+RUN chmod +x /usr/local/bin/generate-ssl-certificate
+
+# Get LetsEncrypt signed certificate
+RUN curl https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.pem > /etc/ssl/certs/lets-encrypt-x1-cross-signed.pem
+RUN curl https://letsencrypt.org/certs/lets-encrypt-x2-cross-signed.pem > /etc/ssl/certs/lets-encrypt-x2-cross-signed.pem
+
+# Start-mailserver script
+ADD start-mailserver.sh /usr/local/bin/start-mailserver.sh
+RUN chmod +x /usr/local/bin/start-mailserver.sh
+
+# SMTP ports
+EXPOSE  25
+EXPOSE  587
+
+# IMAP ports
+EXPOSE  143
+EXPOSE  993
+
+# POP3 ports
+EXPOSE  110
+EXPOSE  995
+
+CMD /usr/local/bin/start-mailserver.sh
--- a/21
+++ b/21
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Thomas VIAL
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/68
+++ b/68
@ -0,0 +1,68 @@
+NAME = tvial/docker-mailserver:dovecot
+
+#all: build run fixtures tests clean
+#all-no-build: run fixtures tests clean
+all: build 
+
+build:
+	docker build --no-cache -t $(NAME) . 
+
+run:
+	# Copy test files
+	cp test/accounts.cf postfix/
+	cp test/main.cf postfix/
+	cp test/virtual postfix/
+	# Run containers
+	docker run -d --name mail \
+		-v "`pwd`/postfix":/tmp/postfix \
+		-v "`pwd`/spamassassin":/tmp/spamassassin \
+		-v "`pwd`/test":/tmp/test \
+		-e SA_TAG=1.0 \
+		-e SA_TAG2=2.0 \
+		-e SA_KILL=3.0 \
+		-e SASL_PASSWD=testing \
+		-h mail.my-domain.com -t $(NAME)
+	sleep 15
+	docker run -d --name mail_pop3 \
+		-v "`pwd`/postfix":/tmp/postfix \
+		-v "`pwd`/spamassassin":/tmp/spamassassin \
+		-v "`pwd`/test":/tmp/test \
+		-e ENABLE_POP3=1 \
+		-h mail.my-domain.com -t $(NAME)
+	sleep 15
+	docker run -d --name mail_smtponly \
+		-v "`pwd`/postfix":/tmp/postfix \
+		-v "`pwd`/spamassassin":/tmp/spamassassin \
+		-v "`pwd`/test":/tmp/test \
+		-e SMTP_ONLY=1 \
+		-h mail.my-domain.com -t $(NAME)
+	sleep 15
+	docker run -d --name mail_fail2ban \
+		-v "`pwd`/postfix":/tmp/postfix \
+		-v "`pwd`/spamassassin":/tmp/spamassassin \
+		-v "`pwd`/test":/tmp/test \
+		-e ENABLE_FAIL2BAN=1 \
+		-h mail.my-domain.com -t $(NAME)
+	# Wait for containers to fully start
+	sleep 15
+
+fixtures:
+	# Sending test mails
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/amavis-spam.txt"
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/amavis-virus.txt"
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/existing-alias-external.txt"
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/existing-alias-local.txt"
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/existing-user.txt"
+	docker exec mail /bin/sh -c "nc 0.0.0.0 25 < /tmp/test/email-templates/non-existing-user.txt"
+	# Wait for mails to be analyzed
+	sleep 10
+
+tests:
+	# Start tests
+	./test/bats/bats test/tests.bats
+
+clean:
+	# Get default files back
+	git checkout postfix/accounts.cf postfix/main.cf postfix/virtual
+	# Remove running test containers
+	docker rm -f mail mail_pop3 mail_smtponly mail_fail2ban
--- a/README.md
+++ b/README.md
@ -0,0 +1,134 @@
+# docker-mailserver
+
+[![Build Status](https://travis-ci.org/tomav/docker-mailserver.svg?branch=master)](https://travis-ci.org/tomav/docker-mailserver)
+
+A fullstack but simple mail server (smtp, imap, antispam, antivirus...).  
+Only configuration files, no SQL database. Keep it simple and versioned.  
+Easy to deploy and upgrade.  
+
+Includes:
+
+- postfix with smtp auth
+- dovecot for sasl, imap (and optional pop3) with ssl support
+- amavis
+- spamassasin supporting custom rules
+- clamav with automatic updates
+- opendkim
+- opendmarc 
+- fail2ban
+- [LetsEncrypt](https://letsencrypt.org/) and self-signed certificates
+- [integration tests](https://travis-ci.org/tomav/docker-mailserver) 
+- [automated builds on docker hub](https://hub.docker.com/r/tvial/docker-mailserver/)
+
+Why I created this image: [Simple mail server with Docker](http://tvi.al/simple-mail-server-with-docker/)
+
+Before you open an issue, please have a look this `README`, the [FAQ](https://github.com/tomav/docker-mailserver/wiki/FAQ) and Postfix documentation. 
+
+## Usage
+
+    # get latest image
+  	docker pull tvial/docker-mailserver
+
+    # create a "docker-compose.yml" file containing:  
+    mail:
+      image: tvial/docker-mailserver
+      hostname: mail
+      domainname: domain.com
+      # your FQDN will be 'mail.domain.com'
+      ports:
+      - "25:25"
+      - "143:143"
+      - "587:587"
+      - "993:993"
+      volumes:
+      - ./spamassassin:/tmp/spamassassin/
+      - ./postfix:/tmp/postfix/
+
+    # start the container
+  	docker-compose up -d mail
+
+## Managing users and aliases
+
+### Users
+
+Users are managed in `postfix/accounts.cf`.  
+Just add the full email address and its encrypted password separated by a pipe.  
+
+Example:
+
+    user1@domain.tld|mypassword-encrypted
+    user2@otherdomain.tld|myotherpassword-encrypted
+
+To generate the password you could run for example the following:
+
+    docker run --rm -ti tvial/docker-mailserver doveadm pw -s MD5-CRYPT -u user1@domain.tld
+
+You will be asked for a password (and for a confirmation of the password). Just copy all the output string in the file `postfix/accounts.cf`.
+
+    The `doveadm pw` command let you choose between several encryption schemes for the password.
+    Use doveadm pw -l to get a list of the currently supported encryption schemes.
+
+
+### Aliases
+
+Please first read [Postfix documentation on virtual aliases](http://www.postfix.org/VIRTUAL_README.html#virtual_alias).
+
+Aliases are managed in `postfix/virtual`.  
+An alias is a full email address that will be:
+* delivered to an existing account in `postfix/accounts.cf`
+* redirected to one or more other email adresses
+
+Alias and target are space separated. 
+
+Example:
+
+    # Alias to existing account
+    alias1@domain.tld user1@domain.tld
+
+    # Forward to external email address
+    alias2@domain.tld external@gmail.com
+
+## Environment variables
+
+* DMS_SSL
+  * *empty* (default) => SSL disabled
+  * letsencrypt => Enables Let's Encrypt certificates
+  * self-signed => Enables self-signed certificates
+* ENABLE_POP3
+  * *empty* (default) => POP3 service disabled
+  * 1 => Enables POP3 service
+* SMTP_ONLY
+  * *empty* (default) => courier daemons might start
+  * *1 => do not launch any courier daemons (imap, pop3)
+* SA_TAG
+  * *2.0* (default) => add spam info headers if at, or above that level
+* SA_TAG2
+  * *6.31* (default) => add 'spam detected' headers at that level
+* SA_KILL
+  * *6.31* (default) => triggers spam evasive actions
+* SASL_PASSWORD
+  * *empty* (default) => No sasl_passwd will be created
+  * *string* => A /etc/postfix/sasl_passwd will be created with that content and postmap will be run on it
+* ENABLE_FAIL2BAN
+  * *empty* (default) => fail2ban service disabled
+  * 1 => Enables fail2ban service
+
+Please read [how the container starts](https://github.com/tomav/docker-mailserver/blob/master/start-mailserver.sh) to understand what's expected.  
+
+## SSL
+
+Please read [the SSL page in the wiki](https://github.com/tomav/docker-mailserver/wiki/SSL) for more information.
+
+## Todo
+
+Things to do or to improve are stored on [Github](https://github.com/tomav/docker-mailserver/issues), some open by myself.
+Feel free to improve this docker image.
+
+## Contribute
+
+- Fork
+- Improve
+- Add integration tests in `test/tests.bats`
+- Build image and run tests using `make`  
+- Document your improvements
+- Commit, push and make a pull-request
--- a/bin/generate-ssl-certificate
+++ b/bin/generate-ssl-certificate
@ -0,0 +1,14 @@
+#!/bin/sh
+
+FQDN=$(hostname)
+
+cd /ssl
+# Create CA certificate
+/usr/lib/ssl/misc/CA.pl -newca
+# Create an unpassworded private key and create an unsigned public key certificate
+openssl req -new -nodes -keyout /ssl/$FQDN-key.pem -out /ssl/$FQDN-req.pem -days 3652
+# Sign the public key certificate with CA certificate
+openssl ca -out /ssl/$FQDN-cert.pem -infiles /ssl/$FQDN-req.pem
+# Combine certificates for courier
+cat /ssl/$FQDN-key.pem /ssl/$FQDN-cert.pem > /ssl/$FQDN-combined.pem
+
--- a/docker-compose.yml.dist
+++ b/docker-compose.yml.dist
@ -0,0 +1,15 @@
+mail:
+  image: tvial/docker-mailserver
+  hostname: mail
+  domainname: domain.com
+  cap_add:
+  - NET_ADMIN
+  ports:
+  - "25:25"
+  - "143:143"
+  - "587:587"
+  - "993:993"
+  volumes:
+  - ./spamassassin:/tmp/spamassassin/
+  - ./postfix:/tmp/postfix/
+  environment:
--- a/dovecot/10-auth.conf
+++ b/dovecot/10-auth.conf
@ -0,0 +1,128 @@
+##
+## Authentication processes
+##
+
+# Disable LOGIN command and all other plaintext authentications unless
+# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP
+# matches the local IP (ie. you're connecting from the same computer), the
+# connection is considered secure and plaintext authentication is allowed.
+# See also ssl=required setting.
+#disable_plaintext_auth = yes
+
+# Authentication cache size (e.g. 10M). 0 means it's disabled. Note that
+# bsdauth, PAM and vpopmail require cache_key to be set for caching to be used.
+#auth_cache_size = 0
+# Time to live for cached data. After TTL expires the cached record is no
+# longer used, *except* if the main database lookup returns internal failure.
+# We also try to handle password changes automatically: If user's previous
+# authentication was successful, but this one wasn't, the cache isn't used.
+# For now this works only with plaintext authentication.
+#auth_cache_ttl = 1 hour
+# TTL for negative hits (user not found, password mismatch).
+# 0 disables caching them completely.
+#auth_cache_negative_ttl = 1 hour
+
+# Space separated list of realms for SASL authentication mechanisms that need
+# them. You can leave it empty if you don't want to support multiple realms.
+# Many clients simply use the first one listed here, so keep the default realm
+# first.
+#auth_realms =
+
+# Default realm/domain to use if none was specified. This is used for both
+# SASL realms and appending @domain to username in plaintext logins.
+#auth_default_realm = 
+
+# List of allowed characters in username. If the user-given username contains
+# a character not listed in here, the login automatically fails. This is just
+# an extra check to make sure user can't exploit any potential quote escaping
+# vulnerabilities with SQL/LDAP databases. If you want to allow all characters,
+# set this value to empty.
+#auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@
+
+# Username character translations before it's looked up from databases. The
+# value contains series of from -> to characters. For example "#@/@" means
+# that '#' and '/' characters are translated to '@'.
+#auth_username_translation =
+
+# Username formatting before it's looked up from databases. You can use
+# the standard variables here, eg. %Lu would lowercase the username, %n would
+# drop away the domain if it was given, or "%n-AT-%d" would change the '@' into
+# "-AT-". This translation is done after auth_username_translation changes.
+#auth_username_format = %Lu
+
+# If you want to allow master users to log in by specifying the master
+# username within the normal username string (ie. not using SASL mechanism's
+# support for it), you can specify the separator character here. The format
+# is then <username><separator><master username>. UW-IMAP uses "*" as the
+# separator, so that could be a good choice.
+#auth_master_user_separator =
+
+# Username to use for users logging in with ANONYMOUS SASL mechanism
+#auth_anonymous_username = anonymous
+
+# Maximum number of dovecot-auth worker processes. They're used to execute
+# blocking passdb and userdb queries (eg. MySQL and PAM). They're
+# automatically created and destroyed as needed.
+#auth_worker_max_count = 30
+
+# Host name to use in GSSAPI principal names. The default is to use the
+# name returned by gethostname(). Use "$ALL" (with quotes) to allow all keytab
+# entries.
+#auth_gssapi_hostname =
+
+# Kerberos keytab to use for the GSSAPI mechanism. Will use the system
+# default (usually /etc/krb5.keytab) if not specified. You may need to change
+# the auth service to run as root to be able to read this file.
+#auth_krb5_keytab = 
+
+# Do NTLM and GSS-SPNEGO authentication using Samba's winbind daemon and
+# ntlm_auth helper. <doc/wiki/Authentication/Mechanisms/Winbind.txt>
+#auth_use_winbind = no
+
+# Path for Samba's ntlm_auth helper binary.
+#auth_winbind_helper_path = /usr/bin/ntlm_auth
+
+# Time to delay before replying to failed authentications.
+#auth_failure_delay = 2 secs
+
+# Require a valid SSL client certificate or the authentication fails.
+#auth_ssl_require_client_cert = no
+
+# Take the username from client's SSL certificate, using 
+# X509_NAME_get_text_by_NID() which returns the subject's DN's
+# CommonName. 
+#auth_ssl_username_from_cert = no
+
+# Space separated list of wanted authentication mechanisms:
+#   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
+#   gss-spnego
+# NOTE: See also disable_plaintext_auth setting.
+auth_mechanisms = plain login
+
+##
+## Password and user databases
+##
+
+#
+# Password database is used to verify user's password (and nothing more).
+# You can have multiple passdbs and userdbs. This is useful if you want to
+# allow both system users (/etc/passwd) and virtual users to login without
+# duplicating the system users into virtual database.
+#
+# <doc/wiki/PasswordDatabase.txt>
+#
+# User database specifies where mails are located and what user/group IDs
+# own them. For single-UID configuration use "static" userdb.
+#
+# <doc/wiki/UserDatabase.txt>
+
+#!include auth-deny.conf.ext
+#!include auth-master.conf.ext
+
+#!include auth-system.conf.ext
+#!include auth-sql.conf.ext
+#!include auth-ldap.conf.ext
+!include auth-passwdfile.inc
+#!include auth-checkpassword.conf.ext
+#!include auth-vpopmail.conf.ext
+#!include auth-static.conf.ext
--- a/dovecot/10-logging.conf
+++ b/dovecot/10-logging.conf
@ -0,0 +1,84 @@
+##
+## Log destination.
+##
+
+# Log file to use for error messages. "syslog" logs to syslog,
+# /dev/stderr logs to stderr.
+#log_path = syslog
+
+# Log file to use for informational messages. Defaults to log_path.
+#info_log_path = 
+# Log file to use for debug messages. Defaults to info_log_path.
+#debug_log_path = 
+
+# Syslog facility to use if you're logging to syslog. Usually if you don't
+# want to use "mail", you'll use local0..local7. Also other standard
+# facilities are supported.
+#syslog_facility = mail
+
+##
+## Logging verbosity and debugging.
+##
+
+# Log unsuccessful authentication attempts and the reasons why they failed.
+auth_verbose = yes
+
+# In case of password mismatches, log the attempted password. Valid values are
+# no, plain and sha1. sha1 can be useful for detecting brute force password
+# attempts vs. user simply trying the same password over and over again.
+# You can also truncate the value to n chars by appending ":n" (e.g. sha1:6).
+auth_verbose_passwords = sha1:6
+
+# Even more verbose logging for debugging purposes. Shows for example SQL
+# queries.
+#auth_debug = no
+
+# In case of password mismatches, log the passwords and used scheme so the
+# problem can be debugged. Enabling this also enables auth_debug.
+#auth_debug_passwords = no
+
+# Enable mail process debugging. This can help you figure out why Dovecot
+# isn't finding your mails.
+#mail_debug = no
+
+# Show protocol level SSL errors.
+verbose_ssl = no
+
+# mail_log plugin provides more event logging for mail processes.
+plugin {
+  # Events to log. Also available: flag_change append
+  #mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
+  # Available fields: uid, box, msgid, from, subject, size, vsize, flags
+  # size and vsize are available only for expunge and copy events.
+  #mail_log_fields = uid box msgid size
+}
+
+##
+## Log formatting.
+##
+
+# Prefix for each line written to log file. % codes are in strftime(3)
+# format.
+#log_timestamp = "%b %d %H:%M:%S "
+
+# Space-separated list of elements we want to log. The elements which have
+# a non-empty variable value are joined together to form a comma-separated
+# string.
+#login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c
+
+# Login log format. %s contains login_log_format_elements string, %$ contains
+# the data we want to log.
+#login_log_format = %$: %s
+ 
+# Log prefix for mail processes. See doc/wiki/Variables.txt for list of
+# possible variables you can use.
+#mail_log_prefix = "%s(%u): "
+
+# Format to use for logging mail deliveries. You can use variables:
+#  %$ - Delivery status message (e.g. "saved to INBOX")
+#  %m - Message-ID
+#  %s - Subject
+#  %f - From address
+#  %p - Physical size
+#  %w - Virtual size
+#deliver_log_format = msgid=%m: %$
--- a/dovecot/10-mail.conf
+++ b/dovecot/10-mail.conf
@ -0,0 +1,374 @@
+##
+## Mailbox locations and namespaces
+##
+
+# Location for users' mailboxes. The default is empty, which means that Dovecot
+# tries to find the mailboxes automatically. This won't work if the user
+# doesn't yet have any mail, so you should explicitly tell Dovecot the full
+# location.
+#
+# If you're using mbox, giving a path to the INBOX file (eg. /var/mail/%u)
+# isn't enough. You'll also need to tell Dovecot where the other mailboxes are
+# kept. This is called the "root mail directory", and it must be the first
+# path given in the mail_location setting.
+#
+# There are a few special variables you can use, eg.:
+#
+#   %u - username
+#   %n - user part in user@domain, same as %u if there's no domain
+#   %d - domain part in user@domain, empty if there's no domain
+#   %h - home directory
+#
+# See doc/wiki/Variables.txt for full list. Some examples:
+#
+#   mail_location = maildir:~/Maildir
+#   mail_location = mbox:~/mail:INBOX=/var/mail/%u
+#   mail_location = mbox:/var/mail/%d/%1n/%n:INDEX=/var/indexes/%d/%1n/%n
+#
+# <doc/wiki/MailLocation.txt>
+#
+mail_location = maildir:/var/mail/%d/%n
+
+# If you need to set multiple mailbox locations or want to change default
+# namespace settings, you can do it by defining namespace sections.
+#
+# You can have private, shared and public namespaces. Private namespaces
+# are for user's personal mails. Shared namespaces are for accessing other
+# users' mailboxes that have been shared. Public namespaces are for shared
+# mailboxes that are managed by sysadmin. If you create any shared or public
+# namespaces you'll typically want to enable ACL plugin also, otherwise all
+# users can access all the shared mailboxes, assuming they have permissions
+# on filesystem level to do so.
+namespace inbox {
+  # Namespace type: private, shared or public
+  #type = private
+
+  # Hierarchy separator to use. You should use the same separator for all
+  # namespaces or some clients get confused. '/' is usually a good one.
+  # The default however depends on the underlying mail storage format.
+  #separator = 
+
+  # Prefix required to access this namespace. This needs to be different for
+  # all namespaces. For example "Public/".
+  #prefix = 
+
+  # Physical location of the mailbox. This is in same format as
+  # mail_location, which is also the default for it.
+  #location =
+
+  # There can be only one INBOX, and this setting defines which namespace
+  # has it.
+  inbox = yes
+
+  # If namespace is hidden, it's not advertised to clients via NAMESPACE
+  # extension. You'll most likely also want to set list=no. This is mostly
+  # useful when converting from another server with different namespaces which
+  # you want to deprecate but still keep working. For example you can create
+  # hidden namespaces with prefixes "~/mail/", "~%u/mail/" and "mail/".
+  #hidden = no
+
+  # Show the mailboxes under this namespace with LIST command. This makes the
+  # namespace visible for clients that don't support NAMESPACE extension.
+  # "children" value lists child mailboxes, but hides the namespace prefix.
+  #list = yes
+
+  # Namespace handles its own subscriptions. If set to "no", the parent
+  # namespace handles them (empty prefix should always have this as "yes")
+  #subscriptions = yes
+}
+
+# Example shared namespace configuration
+#namespace {
+  #type = shared
+  #separator = /
+
+  # Mailboxes are visible under "shared/user@domain/"
+  # %%n, %%d and %%u are expanded to the destination user.
+  #prefix = shared/%%u/
+
+  # Mail location for other users' mailboxes. Note that %variables and ~/
+  # expands to the logged in user's data. %%n, %%d, %%u and %%h expand to the
+  # destination user's data.
+  #location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u
+
+  # Use the default namespace for saving subscriptions.
+  #subscriptions = no
+
+  # List the shared/ namespace only if there are visible shared mailboxes.
+  #list = children
+#}
+# Should shared INBOX be visible as "shared/user" or "shared/user/INBOX"?
+#mail_shared_explicit_inbox = no
+
+# System user and group used to access mails. If you use multiple, userdb
+# can override these by returning uid or gid fields. You can use either numbers
+# or names. <doc/wiki/UserIds.txt>
+#mail_uid =
+#mail_gid =
+
+# Group to enable temporarily for privileged operations. Currently this is
+# used only with INBOX when either its initial creation or dotlocking fails.
+# Typically this is set to "mail" to give access to /var/mail.
+mail_privileged_group = docker
+
+# Grant access to these supplementary groups for mail processes. Typically
+# these are used to set up access to shared mailboxes. Note that it may be
+# dangerous to set these if users can create symlinks (e.g. if "mail" group is
+# set here, ln -s /var/mail ~/mail/var could allow a user to delete others'
+# mailboxes, or ln -s /secret/shared/box ~/mail/mybox would allow reading it).
+#mail_access_groups =
+
+# Allow full filesystem access to clients. There's no access checks other than
+# what the operating system does for the active UID/GID. It works with both
+# maildir and mboxes, allowing you to prefix mailboxes names with eg. /path/
+# or ~user/.
+#mail_full_filesystem_access = no
+
+# Dictionary for key=value mailbox attributes. Currently used by URLAUTH, but
+# soon intended to be used by METADATA as well.
+#mail_attribute_dict =
+
+##
+## Mail processes
+##
+
+# Don't use mmap() at all. This is required if you store indexes to shared
+# filesystems (NFS or clustered filesystem).
+#mmap_disable = no
+
+# Rely on O_EXCL to work when creating dotlock files. NFS supports O_EXCL
+# since version 3, so this should be safe to use nowadays by default.
+#dotlock_use_excl = yes
+
+# When to use fsync() or fdatasync() calls:
+#   optimized (default): Whenever necessary to avoid losing important data
+#   always: Useful with e.g. NFS when write()s are delayed
+#   never: Never use it (best performance, but crashes can lose data)
+#mail_fsync = optimized
+
+# Mail storage exists in NFS. Set this to yes to make Dovecot flush NFS caches
+# whenever needed. If you're using only a single mail server this isn't needed.
+#mail_nfs_storage = no
+# Mail index files also exist in NFS. Setting this to yes requires
+# mmap_disable=yes and fsync_disable=no.
+#mail_nfs_index = no
+
+# Locking method for index files. Alternatives are fcntl, flock and dotlock.
+# Dotlocking uses some tricks which may create more disk I/O than other locking
+# methods. NFS users: flock doesn't work, remember to change mmap_disable.
+#lock_method = fcntl
+
+# Directory in which LDA/LMTP temporarily stores incoming mails >128 kB.
+#mail_temp_dir = /tmp
+
+# Valid UID range for users, defaults to 500 and above. This is mostly
+# to make sure that users can't log in as daemons or other system users.
+# Note that denying root logins is hardcoded to dovecot binary and can't
+# be done even if first_valid_uid is set to 0.
+#first_valid_uid = 500
+#last_valid_uid = 0
+
+# Valid GID range for users, defaults to non-root/wheel. Users having
+# non-valid GID as primary group ID aren't allowed to log in. If user
+# belongs to supplementary groups with non-valid GIDs, those groups are
+# not set.
+#first_valid_gid = 1
+#last_valid_gid = 0
+
+# Maximum allowed length for mail keyword name. It's only forced when trying
+# to create new keywords.
+#mail_max_keyword_length = 50
+
+# ':' separated list of directories under which chrooting is allowed for mail
+# processes (ie. /var/mail will allow chrooting to /var/mail/foo/bar too).
+# This setting doesn't affect login_chroot, mail_chroot or auth chroot
+# settings. If this setting is empty, "/./" in home dirs are ignored.
+# WARNING: Never add directories here which local users can modify, that
+# may lead to root exploit. Usually this should be done only if you don't
+# allow shell access for users. <doc/wiki/Chrooting.txt>
+#valid_chroot_dirs = 
+
+# Default chroot directory for mail processes. This can be overridden for
+# specific users in user database by giving /./ in user's home directory
+# (eg. /home/./user chroots into /home). Note that usually there is no real
+# need to do chrooting, Dovecot doesn't allow users to access files outside
+# their mail directory anyway. If your home directories are prefixed with
+# the chroot directory, append "/." to mail_chroot. <doc/wiki/Chrooting.txt>
+#mail_chroot = 
+
+# UNIX socket path to master authentication server to find users.
+# This is used by imap (for shared users) and lda.
+#auth_socket_path = /var/run/dovecot/auth-userdb
+
+# Directory where to look up mail plugins.
+#mail_plugin_dir = /usr/lib/dovecot/modules
+
+# Space separated list of plugins to load for all services. Plugins specific to
+# IMAP, LDA, etc. are added to this list in their own .conf files.
+#mail_plugins = 
+
+##
+## Mailbox handling optimizations
+##
+
+# Mailbox list indexes can be used to optimize IMAP STATUS commands. They are
+# also required for IMAP NOTIFY extension to be enabled.
+#mailbox_list_index = no
+
+# The minimum number of mails in a mailbox before updates are done to cache
+# file. This allows optimizing Dovecot's behavior to do less disk writes at
+# the cost of more disk reads.
+#mail_cache_min_mail_count = 0
+
+# When IDLE command is running, mailbox is checked once in a while to see if
+# there are any new mails or other changes. This setting defines the minimum
+# time to wait between those checks. Dovecot can also use dnotify, inotify and
+# kqueue to find out immediately when changes occur.
+#mailbox_idle_check_interval = 30 secs
+
+# Save mails with CR+LF instead of plain LF. This makes sending those mails
+# take less CPU, especially with sendfile() syscall with Linux and FreeBSD.
+# But it also creates a bit more disk I/O which may just make it slower.
+# Also note that if other software reads the mboxes/maildirs, they may handle
+# the extra CRs wrong and cause problems.
+#mail_save_crlf = no
+
+# Max number of mails to keep open and prefetch to memory. This only works with
+# some mailbox formats and/or operating systems.
+#mail_prefetch_count = 0
+
+# How often to scan for stale temporary files and delete them (0 = never).
+# These should exist only after Dovecot dies in the middle of saving mails.
+#mail_temp_scan_interval = 1w
+
+##
+## Maildir-specific settings
+##
+
+# By default LIST command returns all entries in maildir beginning with a dot.
+# Enabling this option makes Dovecot return only entries which are directories.
+# This is done by stat()ing each entry, so it causes more disk I/O.
+# (For systems setting struct dirent->d_type, this check is free and it's
+# done always regardless of this setting)
+#maildir_stat_dirs = no
+
+# When copying a message, do it with hard links whenever possible. This makes
+# the performance much better, and it's unlikely to have any side effects.
+#maildir_copy_with_hardlinks = yes
+
+# Assume Dovecot is the only MUA accessing Maildir: Scan cur/ directory only
+# when its mtime changes unexpectedly or when we can't find the mail otherwise.
+#maildir_very_dirty_syncs = no
+
+# If enabled, Dovecot doesn't use the S=<size> in the Maildir filenames for
+# getting the mail's physical size, except when recalculating Maildir++ quota.
+# This can be useful in systems where a lot of the Maildir filenames have a
+# broken size. The performance hit for enabling this is very small.
+#maildir_broken_filename_sizes = no
+
+##
+## mbox-specific settings
+##
+
+# Which locking methods to use for locking mbox. There are four available:
+#  dotlock: Create <mailbox>.lock file. This is the oldest and most NFS-safe
+#           solution. If you want to use /var/mail/ like directory, the users
+#           will need write access to that directory.
+#  dotlock_try: Same as dotlock, but if it fails because of permissions or
+#               because there isn't enough disk space, just skip it.
+#  fcntl  : Use this if possible. Works with NFS too if lockd is used.
+#  flock  : May not exist in all systems. Doesn't work with NFS.
+#  lockf  : May not exist in all systems. Doesn't work with NFS.
+#
+# You can use multiple locking methods; if you do the order they're declared
+# in is important to avoid deadlocks if other MTAs/MUAs are using multiple
+# locking methods as well. Some operating systems don't allow using some of
+# them simultaneously.
+#
+# The Debian value for mbox_write_locks differs from upstream Dovecot. It is
+# changed to be compliant with Debian Policy (section 11.6) for NFS safety.
+#       Dovecot: mbox_write_locks = dotlock fcntl
+#       Debian:  mbox_write_locks = fcntl dotlock
+#
+#mbox_read_locks = fcntl
+#mbox_write_locks = fcntl dotlock
+
+# Maximum time to wait for lock (all of them) before aborting.
+#mbox_lock_timeout = 5 mins
+
+# If dotlock exists but the mailbox isn't modified in any way, override the
+# lock file after this much time.
+#mbox_dotlock_change_timeout = 2 mins
+
+# When mbox changes unexpectedly we have to fully read it to find out what
+# changed. If the mbox is large this can take a long time. Since the change
+# is usually just a newly appended mail, it'd be faster to simply read the
+# new mails. If this setting is enabled, Dovecot does this but still safely
+# fallbacks to re-reading the whole mbox file whenever something in mbox isn't
+# how it's expected to be. The only real downside to this setting is that if
+# some other MUA changes message flags, Dovecot doesn't notice it immediately.
+# Note that a full sync is done with SELECT, EXAMINE, EXPUNGE and CHECK 
+# commands.
+#mbox_dirty_syncs = yes
+
+# Like mbox_dirty_syncs, but don't do full syncs even with SELECT, EXAMINE,
+# EXPUNGE or CHECK commands. If this is set, mbox_dirty_syncs is ignored.
+#mbox_very_dirty_syncs = no
+
+# Delay writing mbox headers until doing a full write sync (EXPUNGE and CHECK
+# commands and when closing the mailbox). This is especially useful for POP3
+# where clients often delete all mails. The downside is that our changes
+# aren't immediately visible to other MUAs.
+#mbox_lazy_writes = yes
+
+# If mbox size is smaller than this (e.g. 100k), don't write index files.
+# If an index file already exists it's still read, just not updated.
+#mbox_min_index_size = 0
+
+# Mail header selection algorithm to use for MD5 POP3 UIDLs when
+# pop3_uidl_format=%m. For backwards compatibility we use apop3d inspired
+# algorithm, but it fails if the first Received: header isn't unique in all
+# mails. An alternative algorithm is "all" that selects all headers.
+#mbox_md5 = apop3d
+
+##
+## mdbox-specific settings
+##
+
+# Maximum dbox file size until it's rotated.
+#mdbox_rotate_size = 2M
+
+# Maximum dbox file age until it's rotated. Typically in days. Day begins
+# from midnight, so 1d = today, 2d = yesterday, etc. 0 = check disabled.
+#mdbox_rotate_interval = 0
+
+# When creating new mdbox files, immediately preallocate their size to
+# mdbox_rotate_size. This setting currently works only in Linux with some
+# filesystems (ext4, xfs).
+#mdbox_preallocate_space = no
+
+##
+## Mail attachments
+##
+
+# sdbox and mdbox support saving mail attachments to external files, which
+# also allows single instance storage for them. Other backends don't support
+# this for now.
+
+# Directory root where to store mail attachments. Disabled, if empty.
+#mail_attachment_dir =
+
+# Attachments smaller than this aren't saved externally. It's also possible to
+# write a plugin to disable saving specific attachments externally.
+#mail_attachment_min_size = 128k
+
+# Filesystem backend to use for saving attachments:
+#  posix : No SiS done by Dovecot (but this might help FS's own deduplication)
+#  sis posix : SiS with immediate byte-by-byte comparison during saving
+#  sis-queue posix : SiS with delayed comparison and deduplication
+#mail_attachment_fs = sis posix
+
+# Hash format to use in attachment filenames. You can add any text and
+# variables: %{md4}, %{md5}, %{sha1}, %{sha256}, %{sha512}, %{size}.
+# Variables can be truncated, e.g. %{sha256:80} returns only first 80 bits
+#mail_attachment_hash = %{sha1}
--- a/dovecot/10-master.conf
+++ b/dovecot/10-master.conf
@ -0,0 +1,127 @@
+#default_process_limit = 100
+#default_client_limit = 1000
+
+# Default VSZ (virtual memory size) limit for service processes. This is mainly
+# intended to catch and kill processes that leak memory before they eat up
+# everything.
+#default_vsz_limit = 256M
+
+# Login user is internally used by login processes. This is the most untrusted
+# user in Dovecot system. It shouldn't have access to anything at all.
+#default_login_user = dovenull
+
+# Internal user is used by unprivileged processes. It should be separate from
+# login user, so that login processes can't disturb other processes.
+#default_internal_user = dovecot
+
+service imap-login {
+  inet_listener imap {
+    #port = 143
+  }
+  inet_listener imaps {
+    #port = 993
+    #ssl = yes
+  }
+
+  # Number of connections to handle before starting a new process. Typically
+  # the only useful values are 0 (unlimited) or 1. 1 is more secure, but 0
+  # is faster. <doc/wiki/LoginProcess.txt>
+  #service_count = 1
+
+  # Number of processes to always keep waiting for more connections.
+  #process_min_avail = 0
+
+  # If you set service_count=0, you probably need to grow this.
+  #vsz_limit = $default_vsz_limit
+}
+
+service pop3-login {
+  inet_listener pop3 {
+    #port = 110
+  }
+  inet_listener pop3s {
+    #port = 995
+    #ssl = yes
+  }
+}
+
+service lmtp {
+  unix_listener lmtp {
+    #mode = 0666
+  }
+
+  # Create inet listener only if you can't use the above UNIX socket
+  #inet_listener lmtp {
+    # Avoid making LMTP visible for the entire internet
+    #address =
+    #port = 
+  #}
+}
+
+service imap {
+  # Most of the memory goes to mmap()ing files. You may need to increase this
+  # limit if you have huge mailboxes.
+  #vsz_limit = $default_vsz_limit
+
+  # Max. number of IMAP processes (connections)
+  #process_limit = 1024
+}
+
+service pop3 {
+  # Max. number of POP3 processes (connections)
+  #process_limit = 1024
+}
+
+service auth {
+  # auth_socket_path points to this userdb socket by default. It's typically
+  # used by dovecot-lda, doveadm, possibly imap process, etc. Users that have
+  # full permissions to this socket are able to get a list of all usernames and
+  # get the results of everyone's userdb lookups.
+  #
+  # The default 0666 mode allows anyone to connect to the socket, but the
+  # userdb lookups will succeed only if the userdb returns an "uid" field that
+  # matches the caller process's UID. Also if caller's uid or gid matches the
+  # socket's uid or gid the lookup succeeds. Anything else causes a failure.
+  #
+  # To give the caller full permissions to lookup all users, set the mode to
+  # something else than 0666 and Dovecot lets the kernel enforce the
+  # permissions (e.g. 0777 allows everyone full permissions).
+  unix_listener auth-userdb {
+    mode = 0666
+    user = docker
+    group = docker
+  }
+
+  unix_listener auth-master {
+    mode = 0600
+    user = docker
+    group = docker
+  }
+
+  # Postfix smtp-auth
+  unix_listener /var/spool/postfix/private/auth {
+    mode = 0666
+    user = docker
+    group = docker
+  }
+
+  # Auth process is run as this user.
+  #user = $default_internal_user
+}
+
+service auth-worker {
+  # Auth worker process is run as root by default, so that it can access
+  # /etc/shadow. If this isn't necessary, the user should be changed to
+  # $default_internal_user.
+  #user = root
+}
+
+service dict {
+  # If dict proxy is used, mail processes should have access to its socket.
+  # For example: mode=0660, group=vmail and global mail_access_groups=vmail
+  unix_listener dict {
+    #mode = 0600
+    #user = 
+    #group = 
+  }
+}
--- a/dovecot/10-ssl.conf
+++ b/dovecot/10-ssl.conf
@ -0,0 +1,58 @@
+##
+## SSL settings
+##
+
+# SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt>
+#ssl = yes
+
+# PEM encoded X.509 SSL/TLS certificate and private key. They're opened before
+# dropping root privileges, so keep the key file unreadable by anyone but
+# root. Included doc/mkcert.sh can be used to easily generate self-signed
+# certificate, just make sure to update the domains in dovecot-openssl.cnf
+ssl_cert = </etc/dovecot/dovecot.pem
+ssl_key = </etc/dovecot/private/dovecot.pem
+
+# If key file is password protected, give the password here. Alternatively
+# give it when starting dovecot with -p parameter. Since this file is often
+# world-readable, you may want to place this setting instead to a different
+# root owned 0600 file by using ssl_key_password = <path.
+#ssl_key_password =
+
+# PEM encoded trusted certificate authority. Set this only if you intend to use
+# ssl_verify_client_cert=yes. The file should contain the CA certificate(s)
+# followed by the matching CRL(s). (e.g. ssl_ca = </etc/ssl/certs/ca.pem)
+#ssl_ca = 
+
+# Require that CRL check succeeds for client certificates.
+#ssl_require_crl = yes
+
+# Directory and/or file for trusted SSL CA certificates. These are used only
+# when Dovecot needs to act as an SSL client (e.g. imapc backend). The
+# directory is usually /etc/ssl/certs in Debian-based systems and the file is
+# /etc/pki/tls/cert.pem in RedHat-based systems.
+#ssl_client_ca_dir =
+#ssl_client_ca_file =
+
+# Request client to send a certificate. If you also want to require it, set
+# auth_ssl_require_client_cert=yes in auth section.
+#ssl_verify_client_cert = no
+
+# Which field from certificate to use for username. commonName and
+# x500UniqueIdentifier are the usual choices. You'll also need to set
+# auth_ssl_username_from_cert=yes.
+#ssl_cert_username_field = commonName
+
+# DH parameters length to use.
+#ssl_dh_parameters_length = 1024
+
+# SSL protocols to use
+#ssl_protocols = !SSLv2
+
+# SSL ciphers to use
+#ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
+
+# Prefer the server's order of ciphers over client's.
+#ssl_prefer_server_ciphers = no
+
+# SSL crypto device to use, for valid values run "openssl engine"
+#ssl_crypto_device =
--- a/dovecot/15-mailboxes.conf
+++ b/dovecot/15-mailboxes.conf
@ -0,0 +1,50 @@
+##
+## Mailbox definitions
+##
+
+# NOTE: Assumes "namespace inbox" has been defined in 10-mail.conf.
+namespace inbox {
+
+  #mailbox name {
+    # auto=create will automatically create this mailbox.
+    # auto=subscribe will both create and subscribe to the mailbox.
+    #auto = no
+
+    # Space separated list of IMAP SPECIAL-USE attributes as specified by
+    # RFC 6154: \All \Archive \Drafts \Flagged \Junk \Sent \Trash
+    #special_use =
+  #}
+
+  # These mailboxes are widely used and could perhaps be created automatically:
+  mailbox Drafts {
+    auto = subscribe
+    special_use = \Drafts
+  }
+  mailbox Junk {
+    special_use = \Junk
+  }
+  mailbox Trash {
+    auto = subscribe
+    special_use = \Trash
+  }
+
+  # For \Sent mailboxes there are two widely used names. We'll mark both of
+  # them as \Sent. User typically deletes one of them if duplicates are created.
+  mailbox Sent {
+    auto = subscribe
+    special_use = \Sent
+  }
+#  mailbox "Sent Messages" {
+#    special_use = \Sent
+#  }
+
+  # If you have a virtual "All messages" mailbox:
+  #mailbox virtual/All {
+  #  special_use = \All
+  #}
+
+  # If you have a virtual "Flagged" mailbox:
+  #mailbox virtual/Flagged {
+  #  special_use = \Flagged
+  #}
+}
--- a/dovecot/auth-passwdfile.inc
+++ b/dovecot/auth-passwdfile.inc
@ -0,0 +1,21 @@
+# Authentication for passwd-file users. Included from 10-auth.conf.
+#
+# passwd-like file with specified location.
+# <doc/wiki/AuthDatabase.PasswdFile.txt>
+
+passdb {
+  driver = passwd-file
+  args = scheme=CRYPT username_format=%u /etc/dovecot/userdb
+}
+
+userdb {
+  driver = passwd-file
+  args = username_format=%u /etc/dovecot/userdb
+
+  # Default fields that can be overridden by passwd-file
+  #default_fields = quota_rule=*:storage=1G
+  default_fields = uid=docker gid=docker home=/var/mail/%d/%u
+
+  # Override fields from passwd-file
+  #override_fields = home=/home/virtual/%u
+}
--- a/dovecot/dovecot.conf
+++ b/dovecot/dovecot.conf
@ -0,0 +1,102 @@
+## Dovecot configuration file
+
+# If you're in a hurry, see http://wiki2.dovecot.org/QuickConfiguration
+
+# "doveconf -n" command gives a clean output of the changed settings. Use it
+# instead of copy&pasting files when posting to the Dovecot mailing list.
+
+# '#' character and everything after it is treated as comments. Extra spaces
+# and tabs are ignored. If you want to use either of these explicitly, put the
+# value inside quotes, eg.: key = "# char and trailing whitespace  "
+
+# Most (but not all) settings can be overridden by different protocols and/or
+# source/destination IPs by placing the settings inside sections, for example:
+# protocol imap { }, local 127.0.0.1 { }, remote 10.0.0.0/8 { }
+
+# Default values are shown for each setting, it's not required to uncomment
+# those. These are exceptions to this though: No sections (e.g. namespace {})
+# or plugin settings are added by default, they're listed only as examples.
+# Paths are also just examples with the real defaults being based on configure
+# options. The paths listed here are for configure --prefix=/usr
+# --sysconfdir=/etc --localstatedir=/var
+
+# Enable installed protocols
+!include_try /etc/dovecot/protocols.d/*.protocol
+
+# A comma separated list of IPs or hosts where to listen in for connections. 
+# "*" listens in all IPv4 interfaces, "::" listens in all IPv6 interfaces.
+# If you want to specify non-default ports or anything more complex,
+# edit conf.d/master.conf.
+#listen = *, ::
+
+# Base directory where to store runtime data.
+#base_dir = /var/run/dovecot/
+
+# Name of this instance. In multi-instance setup doveadm and other commands
+# can use -i <instance_name> to select which instance is used (an alternative
+# to -c <config_path>). The instance name is also added to Dovecot processes
+# in ps output.
+#instance_name = dovecot
+
+# Greeting message for clients.
+#login_greeting = Dovecot ready.
+
+# Space separated list of trusted network ranges. Connections from these
+# IPs are allowed to override their IP addresses and ports (for logging and
+# for authentication checks). disable_plaintext_auth is also ignored for
+# these networks. Typically you'd specify your IMAP proxy servers here.
+#login_trusted_networks =
+
+# Space separated list of login access check sockets (e.g. tcpwrap)
+#login_access_sockets = 
+
+# With proxy_maybe=yes if proxy destination matches any of these IPs, don't do
+# proxying. This isn't necessary normally, but may be useful if the destination
+# IP is e.g. a load balancer's IP.
+#auth_proxy_self =
+
+# Show more verbose process titles (in ps). Currently shows user name and
+# IP address. Useful for seeing who are actually using the IMAP processes
+# (eg. shared mailboxes or if same uid is used for multiple accounts).
+#verbose_proctitle = no
+
+# Should all processes be killed when Dovecot master process shuts down.
+# Setting this to "no" means that Dovecot can be upgraded without
+# forcing existing client connections to close (although that could also be
+# a problem if the upgrade is e.g. because of a security fix).
+#shutdown_clients = yes
+
+# If non-zero, run mail commands via this many connections to doveadm server,
+# instead of running them directly in the same process.
+#doveadm_worker_count = 0
+# UNIX socket or host:port used for connecting to doveadm server
+#doveadm_socket_path = doveadm-server
+
+# Space separated list of environment variables that are preserved on Dovecot
+# startup and passed down to all of its child processes. You can also give
+# key=value pairs to always set specific settings.
+#import_environment = TZ
+
+##
+## Dictionary server settings
+##
+
+# Dictionary can be used to store key=value lists. This is used by several
+# plugins. The dictionary can be accessed either directly or though a
+# dictionary server. The following dict block maps dictionary names to URIs
+# when the server is used. These can then be referenced using URIs in format
+# "proxy::<name>".
+
+dict {
+  #quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
+  #expire = sqlite:/etc/dovecot/dovecot-dict-sql.conf.ext
+}
+
+# Most of the actual configuration gets included below. The filenames are
+# first sorted by their ASCII value and parsed in that order. The 00-prefixes
+# in filenames are intended to make it easier to understand the ordering.
+!include conf.d/*.conf
+
+# A config file can also tried to be included without giving an error if
+# it's not found:
+#!include_try local.conf
--- a/postfix/TrustedHosts
+++ b/postfix/TrustedHosts
@ -0,0 +1,2 @@
+127.0.0.1
+localhost
--- a/postfix/accounts.cf
+++ b/postfix/accounts.cf
@ -0,0 +1 @@
+user@domain.tld|mypassword
--- a/postfix/default-opendkim
+++ b/postfix/default-opendkim
@ -0,0 +1,12 @@
+# Command-line options specified here will override the contents of
+# /etc/opendkim.conf. See opendkim(8) for a complete list of options.
+#DAEMON_OPTS=""
+#
+# Uncomment to specify an alternate socket
+# Note that setting this will override any Socket value in opendkim.conf
+#SOCKET="local:/var/run/opendkim/opendkim.sock" # default
+#SOCKET="inet:54321" # listen on all interfaces on port 54321
+#SOCKET="inet:12345@localhost" # listen on loopback on port 12345
+#SOCKET="inet:12345@192.0.2.1" # listen on 192.0.2.1 on port 12345
+
+SOCKET="inet:12301@localhost"
--- a/postfix/default-opendmarc
+++ b/postfix/default-opendmarc
@ -0,0 +1,11 @@
+# Command-line options specified here will override the contents of
+# /etc/opendmarc.conf. See opendmarc(8) for a complete list of options.
+#DAEMON_OPTS=""
+#
+# Uncomment to specify an alternate socket
+# Note that setting this will override any Socket value in opendkim.conf
+#SOCKET="local:/var/run/opendmarc/opendmarc.sock" # default
+#SOCKET="inet:54321" # listen on all interfaces on port 54321
+#SOCKET="inet:12345@localhost" # listen on loopback on port 12345
+#SOCKET="inet:12345@192.0.2.1" # listen on 192.0.2.1 on port 12345
+SOCKET="inet:54321@localhost"
--- a/postfix/main.cf
+++ b/postfix/main.cf
@ -0,0 +1,64 @@
+# See /usr/share/postfix/main.cf.dist for a commented, more complete version
+
+smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
+biff = no
+append_dot_mydomain = no
+readme_directory = no
+
+# Basic configuration
+# myhostname = 
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+mydestination = 
+relayhost = 
+mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 172.17.0.0/16
+mailbox_size_limit = 0
+recipient_delimiter = +
+inet_interfaces = all
+inet_protocols = all
+
+# TLS parameters
+smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
+smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
+#smtpd_tls_CAfile=
+#smtp_tls_CAfile=
+smtpd_tls_security_level = may
+smtpd_use_tls=yes
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
+smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
+smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
+smtpd_sender_restrictions = permit_mynetworks
+smtp_tls_security_level = may
+smtp_tls_loglevel = 1
+tls_ssl_options = NO_COMPRESSION
+tls_high_cipherlist=EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA
+smtpd_tls_protocols=!SSLv2,!SSLv3
+smtp_tls_protocols=!SSLv2,!SSLv3
+smtpd_tls_mandatory_ciphers = high
+smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
+smtpd_tls_exclude_ciphers = aNULL, LOW, EXP, MEDIUM, ADH, AECDH, MD5, DSS, ECDSA, CAMELLIA128, 3DES, CAMELLIA256, RSA+AES, eNULL
+
+# SASL
+smtpd_sasl_auth_enable = yes
+smtpd_sasl_path = private/auth
+smtpd_sasl_type = dovecot
+smtpd_sasl_security_options = noanonymous
+smtpd_sasl_local_domain = $myhostname
+broken_sasl_auth_clients = yes
+
+# Mail directory
+virtual_mailbox_base = /var/mail
+virtual_mailbox_domains = /etc/postfix/vhost
+virtual_mailbox_maps = hash:/etc/postfix/vmailbox
+virtual_alias_maps = hash:/etc/postfix/virtual
+virtual_uid_maps = static:5000
+virtual_gid_maps = static:5000
+
+# Additional option for filtering
+content_filter = smtp-amavis:[127.0.0.1]:10024
+
+# Milters used by DKIM
+milter_protocol = 2
+milter_default_action = accept
+smtpd_milters = inet:localhost:12301,inet:localhost:54321
+non_smtpd_milters = inet:localhost:12301,inet:localhost:54321
--- a/postfix/master.cf
+++ b/postfix/master.cf
@ -0,0 +1,97 @@
+#
+# Postfix master process configuration file.  For details on the format
+# of the file, see the master(5) manual page (command: "man 5 master" or
+# on-line: http://www.postfix.org/master.5.html).
+#
+# Do not forget to execute "postfix reload" after editing this file.
+#
+# ==========================================================================
+# service type  private unpriv  chroot  wakeup  maxproc command + args
+#               (yes)   (yes)   (yes)   (never) (100)
+# ==========================================================================
+
+smtp      inet  n       -       n       -       -       smtpd
+submission inet n       -       n       -       -       smtpd
+  -o syslog_name=postfix/submission
+  -o smtpd_tls_security_level=encrypt
+  -o smtpd_sasl_auth_enable=yes
+  -o smtpd_sasl_type=dovecot
+  -o smtpd_sasl_path=private/auth
+  -o smtpd_reject_unlisted_recipient=no
+  -o smtpd_sasl_authenticated_header=yes
+  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
+  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
+  -o milter_macro_daemon_name=ORIGINATING
+pickup    fifo  n       -       -       60      1       pickup
+  -o content_filter=
+  -o receive_override_options=no_header_body_checks
+
+cleanup   unix  n       -       -       -       0       cleanup
+qmgr      unix  n       -       n       300     1       qmgr
+tlsmgr    unix  -       -       -       1000?   1       tlsmgr
+rewrite   unix  -       -       -       -       -       trivial-rewrite
+bounce    unix  -       -       -       -       0       bounce
+defer     unix  -       -       -       -       0       bounce
+trace     unix  -       -       -       -       0       bounce
+verify    unix  -       -       -       -       1       verify
+flush     unix  n       -       -       1000?   0       flush
+proxymap  unix  -       -       n       -       -       proxymap
+proxywrite unix -       -       n       -       1       proxymap
+smtp      unix  -       -       -       -       -       smtp
+relay     unix  -       -       -       -       -       smtp
+showq     unix  n       -       -       -       -       showq
+error     unix  -       -       -       -       -       error
+retry     unix  -       -       -       -       -       error
+discard   unix  -       -       -       -       -       discard
+local     unix  -       n       n       -       -       local
+virtual   unix  -       n       n       -       -       virtual
+lmtp      unix  -       -       -       -       -       lmtp
+anvil     unix  -       -       -       -       1       anvil
+scache    unix  -       -       -       -       1       scache
+
+maildrop  unix  -       n       n       -       -       pipe
+  flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
+uucp      unix  -       n       n       -       -       pipe
+  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
+ifmail    unix  -       n       n       -       -       pipe
+  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
+bsmtp     unix  -       n       n       -       -       pipe
+  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
+scalemail-backend unix	-	n	n	-	2	pipe
+  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
+mailman   unix  -       n       n       -       -       pipe
+  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
+  ${nexthop} ${user}
+
+
+#
+# Amavis configuraiton
+#
+
+smtp-amavis     unix    -       -       -       -       2       smtp
+  -o smtp_data_done_timeout=1200
+  -o smtp_send_xforward_command=yes
+  -o disable_dns_lookups=yes
+  -o max_use=20
+  -o smtp_tls_security_level=none
+
+127.0.0.1:10025 inet    n       -       n       -       -       smtpd
+  -o content_filter=
+  -o local_recipient_maps=
+  -o relay_recipient_maps=
+  -o smtpd_restriction_classes=
+  -o smtpd_delay_reject=no
+  -o smtpd_client_restrictions=permit_mynetworks,reject
+  -o smtpd_helo_restrictions=
+  -o smtpd_sender_restrictions=
+  -o smtpd_recipient_restrictions=permit_mynetworks,reject
+  -o smtpd_data_restrictions=reject_unauth_pipelining
+  -o smtpd_end_of_data_restrictions=
+  -o mynetworks=127.0.0.0/8
+  -o smtpd_error_sleep_time=0
+  -o smtpd_soft_error_limit=1001
+  -o smtpd_hard_error_limit=1000
+  -o smtpd_client_connection_count_limit=0
+  -o smtpd_client_connection_rate_limit=0
+  -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks
+  -o smtp_tls_security_level=none
--- a/postfix/opendkim.conf
+++ b/postfix/opendkim.conf
@ -0,0 +1,22 @@
+AutoRestart             Yes
+AutoRestartRate         10/1h
+UMask                   002
+Syslog                  yes
+SyslogSuccess           Yes
+LogWhy                  Yes
+RemoveOldSignatures	Yes
+
+Canonicalization        relaxed/simple
+
+ExternalIgnoreList      refile:/etc/opendkim/TrustedHosts
+InternalHosts           refile:/etc/opendkim/TrustedHosts
+KeyTable                refile:/etc/opendkim/KeyTable
+SigningTable            refile:/etc/opendkim/SigningTable
+
+Mode                    sv
+PidFile                 /var/run/opendkim/opendkim.pid
+SignatureAlgorithm      rsa-sha256
+
+UserID                  opendkim:opendkim
+
+Socket                  inet:12301@localhost
--- a/postfix/opendmarc.conf
+++ b/postfix/opendmarc.conf
@ -0,0 +1,8 @@
+
+PidFile /var/run/opendmarc.pid
+RejectFailures false
+Syslog true
+UMask 0002
+UserID opendmarc:opendmarc
+IgnoreHosts /etc/opendmarc/ignore.hosts
+HistoryFile /var/run/opendmarc/opendmarc.dat
--- a/postfix/virtual
+++ b/postfix/virtual
@ -0,0 +1,7 @@
+#
+# ALIAS => from alias@domain.tld (alias) to user@domain.tld (real account), space separated
+# alias@domain.tld user@domain.tld
+#
+# FORWARD => from redirect@domain.tld to a list of internal/external email addresses, space separated
+# redirect@domain.tld otheruser@domain.tld otheruser@otherdomain.tld
+#
--- a/spamassassin/rules.cf
+++ b/spamassassin/rules.cf
@ -0,0 +1 @@
+# Place you custom Spamassasin rules here
--- a/start-mailserver.sh
+++ b/start-mailserver.sh
@ -0,0 +1,335 @@
+#!/bin/bash
+
+die () {
+  echo >&2 "$@"
+  exit 1
+}
+
+if [ -f /tmp/postfix/accounts.cf ]; then
+  echo "Regenerating postfix 'vmailbox' and 'virtual' for given users"
+  echo "# WARNING: this file is auto-generated. Modify accounts.cf in postfix directory on host" > /etc/postfix/vmailbox
+
+  # Checking that /tmp/postfix/accounts.cf ends with a newline
+  sed -i -e '$a\' /tmp/postfix/accounts.cf
+  # Configuring Dovecot
+  echo -n > /etc/dovecot/userdb
+  chown dovecot:dovecot /etc/dovecot/userdb
+  chmod 640 /etc/dovecot/userdb
+  cp -a /usr/share/dovecot/protocols.d /etc/dovecot/
+  # Disable pop3 (it will be eventually enabled later in the script, if requested)
+  mv /etc/dovecot/protocols.d/pop3d.protocol /etc/dovecot/protocols.d/pop3d.protocol.disab
+  sed -i -e 's/#ssl = yes/ssl = yes/g' /etc/dovecot/conf.d/10-master.conf
+  sed -i -e 's/#port = 993/port = 993/g' /etc/dovecot/conf.d/10-master.conf
+  sed -i -e 's/#port = 995/port = 995/g' /etc/dovecot/conf.d/10-master.conf
+  sed -i -e 's/#ssl = yes/ssl = required/g' /etc/dovecot/conf.d/10-ssl.conf
+
+  # Creating users
+  # pass is encrypted
+  while IFS=$'|' read login pass
+  do
+    # Setting variables for better readability
+    user=$(echo ${login} | cut -d @ -f1)
+    domain=$(echo ${login} | cut -d @ -f2)
+    # Let's go!
+    echo "user '${user}' for domain '${domain}' with password '********'"
+    echo "${login} ${domain}/${user}/" >> /etc/postfix/vmailbox
+    # user database for dovecot has the following format:
+    # user:password:uid:gid:(gecos):home:(shell):extra_fields
+    # Example : ${login}:${pass}:5000:5000::/var/mail/${domain}/${user}::userdb_mail=maildir:/var/mail/${domain}/${user}
+    echo "${login}:${pass}:5000:5000::/var/mail/${domain}/${user}::" >> /etc/dovecot/userdb
+    mkdir -p /var/mail/${domain}
+    if [ ! -d "/var/mail/${domain}/${user}" ]; then
+      maildirmake.dovecot "/var/mail/${domain}/${user}"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Sent"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Trash"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Drafts"
+      echo -e "INBOX\nSent\nTrash\nDrafts" >> "/var/mail/${domain}/${user}/subscriptions"
+      touch "/var/mail/${domain}/${user}/.Sent/maildirfolder"
+
+    fi
+    echo ${domain} >> /tmp/vhost.tmp
+  done < /tmp/postfix/accounts.cf
+else
+  echo "==> Warning: '/tmp/postfix/accounts.cf' is not provided. No mail account created."
+fi
+
+if [ -f /tmp/postfix/virtual ]; then
+  # Copying virtual file
+  cp /tmp/postfix/virtual /etc/postfix/virtual
+  while IFS=$' ' read from to
+  do
+    # Setting variables for better readability
+    uname=$(echo ${from} | cut -d @ -f1)
+    domain=$(echo ${from} | cut -d @ -f2)
+    # if they are equal it means the line looks like: "user1     other@domain.tld"
+    test "$uname" != "$domain" && echo ${domain} >> /tmp/vhost.tmp
+  done < /tmp/postfix/virtual
+else
+  echo "==> Warning: '/tmp/postfix/virtual' is not provided. No mail alias created."
+fi
+
+if [ -f /tmp/vhost.tmp ]; then
+  cat /tmp/vhost.tmp | sort | uniq > /etc/postfix/vhost && rm /tmp/vhost.tmp
+fi
+
+echo "Postfix configurations"
+touch /etc/postfix/vmailbox && postmap /etc/postfix/vmailbox
+touch /etc/postfix/virtual && postmap /etc/postfix/virtual
+
+# DKIM
+# Check if keys are already available
+if [ -e "/tmp/postfix/opendkim/KeyTable" ]; then
+  mkdir -p /etc/opendkim
+  cp -a /tmp/postfix/opendkim/* /etc/opendkim/
+  echo "DKIM keys added for : `ls -C /etc/opendkim/keys/`"
+else 
+  grep -vE '^(\s*$|#)' /etc/postfix/vhost | while read domainname; do
+    mkdir -p /etc/opendkim/keys/$domainname
+    if [ ! -f "/etc/opendkim/keys/$domainname/mail.private" ]; then
+      echo "Creating DKIM private key /etc/opendkim/keys/$domainname/mail.private"
+      pushd /etc/opendkim/keys/$domainname
+      opendkim-genkey --subdomains --domain=$domainname --selector=mail
+      popd
+      echo ""
+      echo "DKIM PUBLIC KEY ################################################################"
+      cat /etc/opendkim/keys/$domainname/mail.txt
+      echo "################################################################################"
+    fi
+    # Write to KeyTable if necessary
+    keytableentry="mail._domainkey.$domainname $domainname:mail:/etc/opendkim/keys/$domainname/mail.private"
+    if [ ! -f "/etc/opendkim/KeyTable" ]; then
+      echo "Creating DKIM KeyTable"
+      echo "mail._domainkey.$domainname $domainname:mail:/etc/opendkim/keys/$domainname/mail.private" > /etc/opendkim/KeyTable
+    else
+      if ! grep -q "$keytableentry" "/etc/opendkim/KeyTable" ; then
+        echo $keytableentry >> /etc/opendkim/KeyTable
+      fi
+    fi
+    # Write to SigningTable if necessary
+    signingtableentry="*@$domainname mail._domainkey.$domainname"
+    if [ ! -f "/etc/opendkim/SigningTable" ]; then
+      echo "Creating DKIM SigningTable"
+      echo "*@$domainname mail._domainkey.$domainname" > /etc/opendkim/SigningTable
+    else
+      if ! grep -q "$signingtableentry" "/etc/opendkim/SigningTable" ; then
+        echo $signingtableentry >> /etc/opendkim/SigningTable
+      fi
+    fi
+  done
+fi
+
+echo "Changing permissions on /etc/opendkim"
+# chown entire directory
+chown -R opendkim:opendkim /etc/opendkim/
+# And make sure permissions are right
+chmod -R 0700 /etc/opendkim/keys/
+
+# DMARC
+# if there is no AuthservID create it
+if [ `cat /etc/opendmarc.conf | grep -w AuthservID | wc -l` -eq 0 ]; then
+  echo "AuthservID $(hostname)" >> /etc/opendmarc.conf
+fi
+if [ `cat /etc/opendmarc.conf | grep -w TrustedAuthservIDs | wc -l` -eq 0 ]; then
+  echo "TrustedAuthservIDs $(hostname)" >> /etc/opendmarc.conf
+fi
+if [ ! -f "/etc/opendmarc/ignore.hosts" ]; then
+  mkdir -p /etc/opendmarc/
+  echo "localhost" >> /etc/opendmarc/ignore.hosts
+fi
+
+# SSL Configuration
+case $DMS_SSL in
+  "letsencrypt" )
+    # letsencrypt folders and files mounted in /etc/letsencrypt
+    if [ -e "/etc/letsencrypt/live/$(hostname)/cert.pem" ] \
+    && [ -e "/etc/letsencrypt/live/$(hostname)/chain.pem" ] \
+    && [ -e "/etc/letsencrypt/live/$(hostname)/privkey.pem" ]; then
+      echo "Adding $(hostname) SSL certificate"
+      # create combined.pem from (cert|chain|privkey).pem with eol after each .pem
+      sed -e '$a\' -s /etc/letsencrypt/live/$(hostname)/{cert,chain,privkey}.pem > /etc/letsencrypt/live/$(hostname)/combined.pem
+
+      # Postfix configuration
+      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/letsencrypt\/live\/'$(hostname)'\/fullchain.pem/g' /etc/postfix/main.cf
+      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/letsencrypt\/live\/'$(hostname)'\/privkey.pem/g' /etc/postfix/main.cf
+
+      # Dovecot configuration
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/letsencrypt\/live\/'$(hostname)'\/fullchain\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/letsencrypt\/live\/'$(hostname)'\/privkey\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+
+      echo "SSL configured with letsencrypt certificates"
+
+    fi
+    ;;
+
+  "custom" )
+    # Adding CA signed SSL certificate if provided in 'postfix/ssl' folder
+    if [ -e "/tmp/postfix/ssl/$(hostname)-full.pem" ]; then
+      echo "Adding $(hostname) SSL certificate"
+      mkdir -p /etc/postfix/ssl
+      cp "/tmp/postfix/ssl/$(hostname)-full.pem" /etc/postfix/ssl
+
+      # Postfix configuration
+      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/postfix/main.cf
+      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/postfix/main.cf
+
+      # Dovecot configuration
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(hostname)'-full\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/postfix\/ssl\/'$(hostname)'-full\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+
+      echo "SSL configured with CA signed/custom certificates"
+
+    fi
+    ;;
+
+  "self-signed" )
+    # Adding self-signed SSL certificate if provided in 'postfix/ssl' folder
+    if [ -e "/tmp/postfix/ssl/$(hostname)-cert.pem" ] \
+    && [ -e "/tmp/postfix/ssl/$(hostname)-key.pem"  ] \
+    && [ -e "/tmp/postfix/ssl/$(hostname)-combined.pem" ] \
+    && [ -e "/tmp/postfix/ssl/demoCA/cacert.pem" ]; then
+      echo "Adding $(hostname) SSL certificate"
+      mkdir -p /etc/postfix/ssl
+      cp "/tmp/postfix/ssl/$(hostname)-cert.pem" /etc/postfix/ssl
+      cp "/tmp/postfix/ssl/$(hostname)-key.pem" /etc/postfix/ssl
+      # Force permission on key file
+      chmod 600 /etc/postfix/ssl/$(hostname)-key.pem
+      cp "/tmp/postfix/ssl/$(hostname)-combined.pem" /etc/postfix/ssl
+      cp /tmp/postfix/ssl/demoCA/cacert.pem /etc/postfix/ssl
+
+      # Postfix configuration
+      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/'$(hostname)'-cert.pem/g' /etc/postfix/main.cf
+      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/postfix\/ssl\/'$(hostname)'-key.pem/g' /etc/postfix/main.cf
+      sed -i -r 's/#smtpd_tls_CAfile=/smtpd_tls_CAfile=\/etc\/postfix\/ssl\/cacert.pem/g' /etc/postfix/main.cf
+      sed -i -r 's/#smtp_tls_CAfile=/smtp_tls_CAfile=\/etc\/postfix\/ssl\/cacert.pem/g' /etc/postfix/main.cf
+      ln -s /etc/postfix/ssl/cacert.pem "/etc/ssl/certs/cacert-$(hostname).pem"
+
+      # Dovecot configuration
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(hostname)'-combined\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/postfix\/ssl\/'$(hostname)'-key\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+
+      echo "SSL configured with self-signed/custom certificates"
+
+    fi
+    ;;
+
+esac
+
+if [ -f /tmp/postfix/main.cf ]; then
+  while read line; do
+    postconf -e "$line"
+  done < /tmp/postfix/main.cf
+  echo "Loaded '/tmp/postfix/main.cf'"
+else
+  echo "'/tmp/postfix/main.cf' not provided. No extra postfix settings loaded."
+fi
+
+if [ ! -z "$SASL_PASSWD" ]; then
+  echo "$SASL_PASSWD" > /etc/postfix/sasl_passwd
+  postmap hash:/etc/postfix/sasl_passwd
+  rm /etc/postfix/sasl_passwd
+  chown root:root /etc/postfix/sasl_passwd.db
+  chmod 0600 /etc/postfix/sasl_passwd.db
+  echo "Loaded SASL_PASSWORD"
+else
+  echo "==> Warning: 'SASL_PASSWORD' is not provided. /etc/postfix/sasl_passwd not created."
+fi
+
+echo "Fixing permissions"
+chown -R 5000:5000 /var/mail
+
+echo "Creating /etc/mailname"
+echo $(hostname -d) > /etc/mailname
+
+echo "Configuring Spamassassin"
+SA_TAG=${SA_TAG:="2.0"} && sed -i -r 's/^\$sa_tag_level_deflt (.*);/\$sa_tag_level_deflt = '$SA_TAG';/g' /etc/amavis/conf.d/20-debian_defaults
+SA_TAG2=${SA_TAG2:="6.31"} && sed -i -r 's/^\$sa_tag2_level_deflt (.*);/\$sa_tag2_level_deflt = '$SA_TAG2';/g' /etc/amavis/conf.d/20-debian_defaults
+SA_KILL=${SA_KILL:="6.31"} && sed -i -r 's/^\$sa_kill_level_deflt (.*);/\$sa_kill_level_deflt = '$SA_KILL';/g' /etc/amavis/conf.d/20-debian_defaults
+test -e /tmp/spamassassin/rules.cf && cp /tmp/spamassassin/rules.cf /etc/spamassassin/
+
+echo "Configuring fail2ban"
+# enable filters
+awk 'BEGIN{unit=0}{if ($1=="[postfix]" || $1=="[dovecot]" || $1=="[sasl]") {unit=1;}
+      if ($1=="enabled" && unit==1) $3="true";
+       else if ($1=="logpath" && unit==1) $3="/var/log/mail/mail.log";
+      print;
+      if (unit==1 && $1~/\[/ && $1!~/postfix|dovecot|sasl/) unit=0;
+}' /etc/fail2ban/jail.conf > /tmp/jail.conf.new && mv /tmp/jail.conf.new /etc/fail2ban/jail.conf && rm -f /tmp/jail.conf.new
+
+cat > /etc/fail2ban/filter.d/dovecot.conf << _EOF_
+# Fail2Ban filter Dovecot authentication and pop3/imap server
+#
+
+[INCLUDES]
+
+before = common.conf
+
+[Definition]
+
+_daemon = (auth|dovecot(-auth)?|auth-worker)
+
+failregex = ^%(__prefix_line)s(pam_unix(\(dovecot:auth\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
+            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
+            ^%(__prefix_line)s(Info|dovecot: auth\(default\)): pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
+            ^\s.*passwd-file\(\S*,<HOST>\): unknown user.*$
+            (?: pop3-login|imap-login): .*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
+
+## ^%(__prefix_line)spasswd-file\(\S*,<HOST>\): unknown user.*$
+ignoreregex =
+_EOF_
+
+
+# increase ban time and find time to 3h
+sed -i "/^bantime *=/c\bantime = 10800"     /etc/fail2ban/jail.conf
+sed -i "/^findtime *=/c\findtime = 10800"   /etc/fail2ban/jail.conf
+
+# avoid warning on startup
+echo "ignoreregex =" >> /etc/fail2ban/filter.d/postfix-sasl.conf
+
+# continue to write the log information in the newly created file after rotating the old log file
+sed -i -r "/^#?compress/c\compress\ncopytruncate" /etc/logrotate.conf
+
+# Setup logging
+mkdir -p /var/log/mail && chown syslog:root /var/log/mail
+touch /var/log/mail/clamav.log && chown -R clamav:root /var/log/mail/clamav.log
+touch /var/log/mail/freshclam.log &&  chown -R clamav:root /var/log/mail/freshclam.log
+sed -i -r 's|/var/log/mail|/var/log/mail/mail|g' /etc/rsyslog.d/50-default.conf
+sed -i -r 's|LogFile /var/log/clamav/|LogFile /var/log/mail/|g' /etc/clamav/clamd.conf
+sed -i -r 's|UpdateLogFile /var/log/clamav/|UpdateLogFile /var/log/mail/|g' /etc/clamav/freshclam.conf
+sed -i -r 's|/var/log/clamav|/var/log/mail|g' /etc/logrotate.d/clamav-daemon
+sed -i -r 's|/var/log/clamav|/var/log/mail|g' /etc/logrotate.d/clamav-freshclam
+sed -i -r 's|/var/log/mail|/var/log/mail/mail|g' /etc/logrotate.d/rsyslog
+
+echo "Starting daemons"
+cron
+/etc/init.d/rsyslog start
+##/etc/init.d/saslauthd start
+
+if [ "$SMTP_ONLY" != 1 ]; then
+  # Here we are starting sasl and imap, not pop3 because it's disabled by default
+  echo " * Starting dovecot services"
+  /usr/sbin/dovecot -F -c /etc/dovecot/dovecot.conf &
+fi
+
+if [ "$ENABLE_POP3" = 1 -a "$SMTP_ONLY" != 1 ]; then
+  echo "Starting POP3 services"
+  mv /etc/dovecot/protocols.d/pop3d.protocol.disab /etc/dovecot/protocols.d/pop3d.protocol
+  /usr/sbin/dovecot reload
+fi
+
+/etc/init.d/spamassassin start
+/etc/init.d/clamav-daemon start
+/etc/init.d/amavis start
+/etc/init.d/opendkim start
+/etc/init.d/opendmarc start
+/etc/init.d/postfix start
+
+if [ "$ENABLE_FAIL2BAN" = 1 ]; then
+  echo "Starting fail2ban service"
+  /etc/init.d/fail2ban start
+fi
+
+echo "Listing users"
+/usr/sbin/dovecot user '*'
+
+echo "Starting..."
+tail -f /var/log/mail/mail.log
--- a/test/accounts.cf
+++ b/test/accounts.cf
@ -0,0 +1,2 @@
+user1@localhost.localdomain|mypassword
+user2@otherdomain.tld|mypassword
--- a/test/auth/imap-auth.txt
+++ b/test/auth/imap-auth.txt
@ -0,0 +1,4 @@
+a1 LOGIN user1@localhost.localdomain mypassword
+a3 EXAMINE INBOX
+a4 FETCH 1 BODY[]
+a5 LOGOUT
--- a/test/auth/pop3-auth.txt
+++ b/test/auth/pop3-auth.txt
@ -0,0 +1,4 @@
+USER user1@localhost.localdomain
+PASS mypassword
+LIST
+quit
--- a/test/auth/smtp-auth-cram-md5.txt
+++ b/test/auth/smtp-auth-cram-md5.txt
@ -0,0 +1,26 @@
+# This is the output of a manual test.
+# CRAM-MD5 is not (yet) testable with telnet.
+#
+# # telnet localhost 25
+# Trying ::1...
+# Connected to localhost.
+# Escape character is '^]'.
+# 220 mail.my-domain.com ESMTP Postfix (Ubuntu)
+# ehlo test
+# 250-mail.my-domain.com
+# 250-PIPELINING
+# 250-SIZE 10240000
+# 250-VRFY
+# 250-ETRN
+# 250-STARTTLS
+# 250-AUTH PLAIN LOGIN CRAM-MD5 DIGEST-MD5
+# 250-AUTH=PLAIN LOGIN CRAM-MD5 DIGEST-MD5
+# 250-ENHANCEDSTATUSCODES
+# 250-8BITMIME
+# 250 DSN
+# AUTH CRAM-MD5
+# 334 PDIxMDMyODkzMTMuMTA2Mzg2MjhAbWFpbC5teS1kb21haW4uY29tPg==
+# dXNlcjFAbG9jYWxob3N0LmxvY2FsZG9tYWluIGJlYjUxNzg4OGE5ZWI0OGM1NjQ2MTYwZGY3NTY1ZWNh
+# 235 2.7.0 Authentication successful
+# QUIT
+# 221 2.0.0 Bye
--- a/test/auth/smtp-auth-login-wrong.txt
+++ b/test/auth/smtp-auth-login-wrong.txt
@ -0,0 +1,4 @@
+EHLO mail
+AUTH LOGIN dXNlcjFAbG9jYWxob3N0LmxvY2FsZG9tYWlu
+Bn3JKisq4HQ2RO==
+QUIT
--- a/test/auth/smtp-auth-login.txt
+++ b/test/auth/smtp-auth-login.txt
@ -0,0 +1,4 @@
+EHLO mail
+AUTH LOGIN dXNlcjFAbG9jYWxob3N0LmxvY2FsZG9tYWlu
+bXlwYXNzd29yZA==
+QUIT
--- a/test/auth/smtp-auth-plain-wrong.txt
+++ b/test/auth/smtp-auth-plain-wrong.txt
@ -0,0 +1,3 @@
+EHLO mail
+AUTH PLAIN WRONGPASSWORD
+QUIT
--- a/test/auth/smtp-auth-plain.txt
+++ b/test/auth/smtp-auth-plain.txt
@ -0,0 +1,3 @@
+EHLO mail
+AUTH PLAIN dXNlcjFAbG9jYWxob3N0LmxvY2FsZG9tYWluAHVzZXIxQGxvY2FsaG9zdC5sb2NhbGRvbWFpbgBteXBhc3N3b3Jk
+QUIT
--- a/test/bats/bats
+++ b/test/bats/bats
@ -0,0 +1,142 @@
+#!/usr/bin/env bash
+set -e
+
+version() {
+  echo "Bats 0.4.0"
+}
+
+usage() {
+  version
+  echo "Usage: bats [-c] [-p | -t] <test> [<test> ...]"
+}
+
+help() {
+  usage
+  echo
+  echo "  <test> is the path to a Bats test file, or the path to a directory"
+  echo "  containing Bats test files."
+  echo
+  echo "  -c, --count    Count the number of test cases without running any tests"
+  echo "  -h, --help     Display this help message"
+  echo "  -p, --pretty   Show results in pretty format (default for terminals)"
+  echo "  -t, --tap      Show results in TAP format"
+  echo "  -v, --version  Display the version number"
+  echo
+  echo "  For more information, see https://github.com/sstephenson/bats"
+  echo
+}
+
+resolve_link() {
+  $(type -p greadlink readlink | head -1) "$1"
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
+expand_path() {
+  { cd "$(dirname "$1")" 2>/dev/null
+    local dirname="$PWD"
+    cd "$OLDPWD"
+    echo "$dirname/$(basename "$1")"
+  } || echo "$1"
+}
+
+BATS_LIBEXEC="$(abs_dirname "$0")"
+export BATS_PREFIX="$(abs_dirname "$BATS_LIBEXEC")"
+export BATS_CWD="$(abs_dirname .)"
+export PATH="$BATS_LIBEXEC:$PATH"
+
+options=()
+arguments=()
+for arg in "$@"; do
+  if [ "${arg:0:1}" = "-" ]; then
+    if [ "${arg:1:1}" = "-" ]; then
+      options[${#options[*]}]="${arg:2}"
+    else
+      index=1
+      while option="${arg:$index:1}"; do
+        [ -n "$option" ] || break
+        options[${#options[*]}]="$option"
+        let index+=1
+      done
+    fi
+  else
+    arguments[${#arguments[*]}]="$arg"
+  fi
+done
+
+unset count_flag pretty
+[ -t 0 ] && [ -t 1 ] && pretty="1"
+[ -n "$CI" ] && pretty=""
+
+for option in "${options[@]}"; do
+  case "$option" in
+  "h" | "help" )
+    help
+    exit 0
+    ;;
+  "v" | "version" )
+    version
+    exit 0
+    ;;
+  "c" | "count" )
+    count_flag="-c"
+    ;;
+  "t" | "tap" )
+    pretty=""
+    ;;
+  "p" | "pretty" )
+    pretty="1"
+    ;;
+  * )
+    usage >&2
+    exit 1
+    ;;
+  esac
+done
+
+if [ "${#arguments[@]}" -eq 0 ]; then
+  usage >&2
+  exit 1
+fi
+
+filenames=()
+for filename in "${arguments[@]}"; do
+  if [ -d "$filename" ]; then
+    shopt -s nullglob
+    for suite_filename in "$(expand_path "$filename")"/*.bats; do
+      filenames["${#filenames[@]}"]="$suite_filename"
+    done
+    shopt -u nullglob
+  else
+    filenames["${#filenames[@]}"]="$(expand_path "$filename")"
+  fi
+done
+
+if [ "${#filenames[@]}" -eq 1 ]; then
+  command="bats-exec-test"
+else
+  command="bats-exec-suite"
+fi
+
+if [ -n "$pretty" ]; then
+  extended_syntax_flag="-x"
+  formatter="bats-format-tap-stream"
+else
+  extended_syntax_flag=""
+  formatter="cat"
+fi
+
+set -o pipefail execfail
+exec "$command" $count_flag $extended_syntax_flag "${filenames[@]}" | "$formatter"
--- a/test/bats/bats-exec-suite
+++ b/test/bats/bats-exec-suite
@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -e
+
+count_only_flag=""
+if [ "$1" = "-c" ]; then
+  count_only_flag=1
+  shift
+fi
+
+extended_syntax_flag=""
+if [ "$1" = "-x" ]; then
+  extended_syntax_flag="-x"
+  shift
+fi
+
+trap "kill 0; exit 1" int
+
+count=0
+for filename in "$@"; do
+  let count+="$(bats-exec-test -c "$filename")"
+done
+
+if [ -n "$count_only_flag" ]; then
+  echo "$count"
+  exit
+fi
+
+echo "1..$count"
+status=0
+offset=0
+for filename in "$@"; do
+  index=0
+  {
+    IFS= read -r # 1..n
+    while IFS= read -r line; do
+      case "$line" in
+      "begin "* )
+        let index+=1
+        echo "${line/ $index / $(($offset + $index)) }"
+        ;;
+      "ok "* | "not ok "* )
+        [ -n "$extended_syntax_flag" ] || let index+=1
+        echo "${line/ $index / $(($offset + $index)) }"
+        [ "${line:0:6}" != "not ok" ] || status=1
+        ;;
+      * )
+        echo "$line"
+        ;;
+      esac
+    done
+  } < <( bats-exec-test $extended_syntax_flag "$filename" )
+  offset=$(($offset + $index))
+done
+
+exit "$status"
--- a/test/bats/bats-exec-test
+++ b/test/bats/bats-exec-test
@ -0,0 +1,346 @@
+#!/usr/bin/env bash
+set -e
+set -E
+set -T
+
+BATS_COUNT_ONLY=""
+if [ "$1" = "-c" ]; then
+  BATS_COUNT_ONLY=1
+  shift
+fi
+
+BATS_EXTENDED_SYNTAX=""
+if [ "$1" = "-x" ]; then
+  BATS_EXTENDED_SYNTAX="$1"
+  shift
+fi
+
+BATS_TEST_FILENAME="$1"
+if [ -z "$BATS_TEST_FILENAME" ]; then
+  echo "usage: bats-exec <filename>" >&2
+  exit 1
+elif [ ! -f "$BATS_TEST_FILENAME" ]; then
+  echo "bats: $BATS_TEST_FILENAME does not exist" >&2
+  exit 1
+else
+  shift
+fi
+
+BATS_TEST_DIRNAME="$(dirname "$BATS_TEST_FILENAME")"
+BATS_TEST_NAMES=()
+
+load() {
+  local name="$1"
+  local filename
+
+  if [ "${name:0:1}" = "/" ]; then
+    filename="${name}"
+  else
+    filename="$BATS_TEST_DIRNAME/${name}.bash"
+  fi
+
+  [ -f "$filename" ] || {
+    echo "bats: $filename does not exist" >&2
+    exit 1
+  }
+
+  source "${filename}"
+}
+
+run() {
+  local e E T oldIFS
+  [[ ! "$-" =~ e ]] || e=1
+  [[ ! "$-" =~ E ]] || E=1
+  [[ ! "$-" =~ T ]] || T=1
+  set +e
+  set +E
+  set +T
+  output="$("$@" 2>&1)"
+  status="$?"
+  oldIFS=$IFS
+  IFS=$'\n' lines=($output)
+  [ -z "$e" ] || set -e
+  [ -z "$E" ] || set -E
+  [ -z "$T" ] || set -T
+  IFS=$oldIFS
+}
+
+setup() {
+  true
+}
+
+teardown() {
+  true
+}
+
+skip() {
+  BATS_TEST_SKIPPED=${1:-1}
+  BATS_TEST_COMPLETED=1
+  exit 0
+}
+
+bats_test_begin() {
+  BATS_TEST_DESCRIPTION="$1"
+  if [ -n "$BATS_EXTENDED_SYNTAX" ]; then
+    echo "begin $BATS_TEST_NUMBER $BATS_TEST_DESCRIPTION" >&3
+  fi
+  setup
+}
+
+bats_test_function() {
+  local test_name="$1"
+  BATS_TEST_NAMES["${#BATS_TEST_NAMES[@]}"]="$test_name"
+}
+
+bats_capture_stack_trace() {
+  BATS_PREVIOUS_STACK_TRACE=( "${BATS_CURRENT_STACK_TRACE[@]}" )
+  BATS_CURRENT_STACK_TRACE=()
+
+  local test_pattern=" $BATS_TEST_NAME $BATS_TEST_SOURCE"
+  local setup_pattern=" setup $BATS_TEST_SOURCE"
+  local teardown_pattern=" teardown $BATS_TEST_SOURCE"
+
+  local frame
+  local index=1
+
+  while frame="$(caller "$index")"; do
+    BATS_CURRENT_STACK_TRACE["${#BATS_CURRENT_STACK_TRACE[@]}"]="$frame"
+    if [[ "$frame" = *"$test_pattern"     || \
+          "$frame" = *"$setup_pattern"    || \
+          "$frame" = *"$teardown_pattern" ]]; then
+      break
+    else
+      let index+=1
+    fi
+  done
+
+  BATS_SOURCE="$(bats_frame_filename "${BATS_CURRENT_STACK_TRACE[0]}")"
+  BATS_LINENO="$(bats_frame_lineno "${BATS_CURRENT_STACK_TRACE[0]}")"
+}
+
+bats_print_stack_trace() {
+  local frame
+  local index=1
+  local count="${#@}"
+
+  for frame in "$@"; do
+    local filename="$(bats_trim_filename "$(bats_frame_filename "$frame")")"
+    local lineno="$(bats_frame_lineno "$frame")"
+
+    if [ $index -eq 1 ]; then
+      echo -n "# ("
+    else
+      echo -n "#  "
+    fi
+
+    local fn="$(bats_frame_function "$frame")"
+    if [ "$fn" != "$BATS_TEST_NAME" ]; then
+      echo -n "from function \`$fn' "
+    fi
+
+    if [ $index -eq $count ]; then
+      echo "in test file $filename, line $lineno)"
+    else
+      echo "in file $filename, line $lineno,"
+    fi
+
+    let index+=1
+  done
+}
+
+bats_print_failed_command() {
+  local frame="$1"
+  local status="$2"
+  local filename="$(bats_frame_filename "$frame")"
+  local lineno="$(bats_frame_lineno "$frame")"
+
+  local failed_line="$(bats_extract_line "$filename" "$lineno")"
+  local failed_command="$(bats_strip_string "$failed_line")"
+  echo -n "#   \`${failed_command}' "
+
+  if [ $status -eq 1 ]; then
+    echo "failed"
+  else
+    echo "failed with status $status"
+  fi
+}
+
+bats_frame_lineno() {
+  local frame="$1"
+  local lineno="${frame%% *}"
+  echo "$lineno"
+}
+
+bats_frame_function() {
+  local frame="$1"
+  local rest="${frame#* }"
+  local fn="${rest%% *}"
+  echo "$fn"
+}
+
+bats_frame_filename() {
+  local frame="$1"
+  local rest="${frame#* }"
+  local filename="${rest#* }"
+
+  if [ "$filename" = "$BATS_TEST_SOURCE" ]; then
+    echo "$BATS_TEST_FILENAME"
+  else
+    echo "$filename"
+  fi
+}
+
+bats_extract_line() {
+  local filename="$1"
+  local lineno="$2"
+  sed -n "${lineno}p" "$filename"
+}
+
+bats_strip_string() {
+  local string="$1"
+  printf "%s" "$string" | sed -e "s/^[ "$'\t'"]*//" -e "s/[ "$'\t'"]*$//"
+}
+
+bats_trim_filename() {
+  local filename="$1"
+  local length="${#BATS_CWD}"
+
+  if [ "${filename:0:length+1}" = "${BATS_CWD}/" ]; then
+    echo "${filename:length+1}"
+  else
+    echo "$filename"
+  fi
+}
+
+bats_debug_trap() {
+  if [ "$BASH_SOURCE" != "$1" ]; then
+    bats_capture_stack_trace
+  fi
+}
+
+bats_error_trap() {
+  BATS_ERROR_STATUS="$?"
+  BATS_ERROR_STACK_TRACE=( "${BATS_PREVIOUS_STACK_TRACE[@]}" )
+  trap - debug
+}
+
+bats_teardown_trap() {
+  trap "bats_exit_trap" exit
+  local status=0
+  teardown >>"$BATS_OUT" 2>&1 || status="$?"
+
+  if [ $status -eq 0 ]; then
+    BATS_TEARDOWN_COMPLETED=1
+  elif [ -n "$BATS_TEST_COMPLETED" ]; then
+    BATS_ERROR_STATUS="$status"
+    BATS_ERROR_STACK_TRACE=( "${BATS_CURRENT_STACK_TRACE[@]}" )
+  fi
+
+  bats_exit_trap
+}
+
+bats_exit_trap() {
+  local status
+  local skipped
+  trap - err exit
+
+  skipped=""
+  if [ -n "$BATS_TEST_SKIPPED" ]; then
+    skipped=" # skip"
+    if [ "1" != "$BATS_TEST_SKIPPED" ]; then
+      skipped+=" ($BATS_TEST_SKIPPED)"
+    fi
+  fi
+
+  if [ -z "$BATS_TEST_COMPLETED" ] || [ -z "$BATS_TEARDOWN_COMPLETED" ]; then
+    echo "not ok $BATS_TEST_NUMBER $BATS_TEST_DESCRIPTION" >&3
+    bats_print_stack_trace "${BATS_ERROR_STACK_TRACE[@]}" >&3
+    bats_print_failed_command "${BATS_ERROR_STACK_TRACE[${#BATS_ERROR_STACK_TRACE[@]}-1]}" "$BATS_ERROR_STATUS" >&3
+    sed -e "s/^/# /" < "$BATS_OUT" >&3
+    status=1
+  else
+    echo "ok ${BATS_TEST_NUMBER}${skipped} ${BATS_TEST_DESCRIPTION}" >&3
+    status=0
+  fi
+
+  rm -f "$BATS_OUT"
+  exit "$status"
+}
+
+bats_perform_tests() {
+  echo "1..$#"
+  test_number=1
+  status=0
+  for test_name in "$@"; do
+    "$0" $BATS_EXTENDED_SYNTAX "$BATS_TEST_FILENAME" "$test_name" "$test_number" || status=1
+    let test_number+=1
+  done
+  exit "$status"
+}
+
+bats_perform_test() {
+  BATS_TEST_NAME="$1"
+  if [ "$(type -t "$BATS_TEST_NAME" || true)" = "function" ]; then
+    BATS_TEST_NUMBER="$2"
+    if [ -z "$BATS_TEST_NUMBER" ]; then
+      echo "1..1"
+      BATS_TEST_NUMBER="1"
+    fi
+
+    BATS_TEST_COMPLETED=""
+    BATS_TEARDOWN_COMPLETED=""
+    trap "bats_debug_trap \"\$BASH_SOURCE\"" debug
+    trap "bats_error_trap" err
+    trap "bats_teardown_trap" exit
+    "$BATS_TEST_NAME" >>"$BATS_OUT" 2>&1
+    BATS_TEST_COMPLETED=1
+
+  else
+    echo "bats: unknown test name \`$BATS_TEST_NAME'" >&2
+    exit 1
+  fi
+}
+
+if [ -z "$TMPDIR" ]; then
+  BATS_TMPDIR="/tmp"
+else
+  BATS_TMPDIR="${TMPDIR%/}"
+fi
+
+BATS_TMPNAME="$BATS_TMPDIR/bats.$$"
+BATS_PARENT_TMPNAME="$BATS_TMPDIR/bats.$PPID"
+BATS_OUT="${BATS_TMPNAME}.out"
+
+bats_preprocess_source() {
+  BATS_TEST_SOURCE="${BATS_TMPNAME}.src"
+  { tr -d '\r' < "$BATS_TEST_FILENAME"; echo; } | bats-preprocess > "$BATS_TEST_SOURCE"
+  trap "bats_cleanup_preprocessed_source" err exit
+  trap "bats_cleanup_preprocessed_source; exit 1" int
+}
+
+bats_cleanup_preprocessed_source() {
+  rm -f "$BATS_TEST_SOURCE"
+}
+
+bats_evaluate_preprocessed_source() {
+  if [ -z "$BATS_TEST_SOURCE" ]; then
+    BATS_TEST_SOURCE="${BATS_PARENT_TMPNAME}.src"
+  fi
+  source "$BATS_TEST_SOURCE"
+}
+
+exec 3<&1
+
+if [ "$#" -eq 0 ]; then
+  bats_preprocess_source
+  bats_evaluate_preprocessed_source
+
+  if [ -n "$BATS_COUNT_ONLY" ]; then
+    echo "${#BATS_TEST_NAMES[@]}"
+  else
+    bats_perform_tests "${BATS_TEST_NAMES[@]}"
+  fi
+else
+  bats_evaluate_preprocessed_source
+  bats_perform_test "$@"
+fi
--- a/test/bats/bats-format-tap-stream
+++ b/test/bats/bats-format-tap-stream
@ -0,0 +1,165 @@
+#!/usr/bin/env bash
+set -e
+
+# Just stream the TAP output (sans extended syntax) if tput is missing
+command -v tput >/dev/null || exec grep -v "^begin "
+
+header_pattern='[0-9]+\.\.[0-9]+'
+IFS= read -r header
+
+if [[ "$header" =~ $header_pattern ]]; then
+  count="${header:3}"
+  index=0
+  failures=0
+  skipped=0
+  name=""
+  count_column_width=$(( ${#count} * 2 + 2 ))
+else
+  # If the first line isn't a TAP plan, print it and pass the rest through
+  printf "%s\n" "$header"
+  exec cat
+fi
+
+update_screen_width() {
+  screen_width="$(tput cols)"
+  count_column_left=$(( $screen_width - $count_column_width ))
+}
+
+trap update_screen_width WINCH
+update_screen_width
+
+begin() {
+  go_to_column 0
+  printf_with_truncation $(( $count_column_left - 1 )) "   %s" "$name"
+  clear_to_end_of_line
+  go_to_column $count_column_left
+  printf "%${#count}s/${count}" "$index"
+  go_to_column 1
+}
+
+pass() {
+  go_to_column 0
+  printf " ✓ %s" "$name"
+  advance
+}
+
+skip() {
+  local reason="$1"
+  [ -z "$reason" ] || reason=": $reason"
+  go_to_column 0
+  printf " - %s (skipped%s)" "$name" "$reason"
+  advance
+}
+
+fail() {
+  go_to_column 0
+  set_color 1 bold
+  printf " ✗ %s" "$name"
+  advance
+}
+
+log() {
+  set_color 1
+  printf "   %s\n" "$1"
+  clear_color
+}
+
+summary() {
+  printf "\n%d test%s" "$count" "$(plural "$count")"
+
+  printf ", %d failure%s" "$failures" "$(plural "$failures")"
+
+  if [ "$skipped" -gt 0 ]; then
+    printf ", %d skipped" "$skipped"
+  fi
+
+  printf "\n"
+}
+
+printf_with_truncation() {
+  local width="$1"
+  shift
+  local string="$(printf "$@")"
+
+  if [ "${#string}" -gt "$width" ]; then
+    printf "%s..." "${string:0:$(( $width - 4 ))}"
+  else
+    printf "%s" "$string"
+  fi
+}
+
+go_to_column() {
+  local column="$1"
+  printf "\x1B[%dG" $(( $column + 1 ))
+}
+
+clear_to_end_of_line() {
+  printf "\x1B[K"
+}
+
+advance() {
+  clear_to_end_of_line
+  echo
+  clear_color
+}
+
+set_color() {
+  local color="$1"
+  local weight="$2"
+  printf "\x1B[%d;%dm" $(( 30 + $color )) "$( [ "$weight" = "bold" ] && echo 1 || echo 22 )"
+}
+
+clear_color() {
+  printf "\x1B[0m"
+}
+
+plural() {
+  [ "$1" -eq 1 ] || echo "s"
+}
+
+_buffer=""
+
+buffer() {
+  _buffer="${_buffer}$("$@")"
+}
+
+flush() {
+  printf "%s" "$_buffer"
+  _buffer=""
+}
+
+finish() {
+  flush
+  printf "\n"
+}
+
+trap finish EXIT
+
+while IFS= read -r line; do
+  case "$line" in
+  "begin "* )
+    let index+=1
+    name="${line#* $index }"
+    buffer begin
+    flush
+    ;;
+  "ok "* )
+    skip_expr="ok $index # skip (\(([^)]*)\))?"
+    if [[ "$line" =~ $skip_expr ]]; then
+      let skipped+=1
+      buffer skip "${BASH_REMATCH[2]}"
+    else
+      buffer pass
+    fi
+    ;;
+  "not ok "* )
+    let failures+=1
+    buffer fail
+    ;;
+  "# "* )
+    buffer log "${line:2}"
+    ;;
+  esac
+done
+
+buffer summary
--- a/test/bats/bats-preprocess
+++ b/test/bats/bats-preprocess
@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+set -e
+
+encode_name() {
+  local name="$1"
+  local result="test_"
+
+  if [[ ! "$name" =~ [^[:alnum:]\ _-] ]]; then
+    name="${name//_/-5f}"
+    name="${name//-/-2d}"
+    name="${name// /_}"
+    result+="$name"
+  else
+    local length="${#name}"
+    local char i
+
+    for ((i=0; i<length; i++)); do
+      char="${name:$i:1}"
+      if [ "$char" = " " ]; then
+        result+="_"
+      elif [[ "$char" =~ [[:alnum:]] ]]; then
+        result+="$char"
+      else
+        result+="$(printf -- "-%02x" \'"$char")"
+      fi
+    done
+  fi
+
+  echo "$result"
+}
+
+tests=()
+index=0
+pattern='^ *@test  *([^ ].*)  *\{ *(.*)$'
+
+while IFS= read -r line; do
+  let index+=1
+  if [[ "$line" =~ $pattern ]]; then
+    quoted_name="${BASH_REMATCH[1]}"
+    body="${BASH_REMATCH[2]}"
+    name="$(eval echo "$quoted_name")"
+    encoded_name="$(encode_name "$name")"
+    tests["${#tests[@]}"]="$encoded_name"
+    echo "${encoded_name}() { bats_test_begin ${quoted_name} ${index}; ${body}"
+  else
+    printf "%s\n" "$line"
+  fi
+done
+
+for test_name in "${tests[@]}"; do
+  echo "bats_test_function ${test_name}"
+done
--- a/test/email-templates/amavis-spam.txt
+++ b/test/email-templates/amavis-spam.txt
@ -0,0 +1,14 @@
+HELO mail.external.tld
+MAIL FROM: spam@external.tld
+RCPT TO: user1@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <user1@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+This is a test mail.
+XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X
+
+.
+QUIT
+
--- a/test/email-templates/amavis-virus.txt
+++ b/test/email-templates/amavis-virus.txt
@ -0,0 +1,33 @@
+HELO mail.external.tld
+MAIL FROM: virus@external.tld
+RCPT TO: user1@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <user1@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+
+Content-type: multipart/mixed; boundary="emailboundary"
+MIME-version: 1.0
+
+This is a multi-part message in MIME format.
+--emailboundary
+Content-type: text/plain
+
+This is the body of the message.
+
+--emailboundary
+Content-type: application/octet-stream
+Content-transfer-encoding: base64
+
+UEsDBAoAAAAAAOCYuCg8z1FoRAAAAEQAAAAJAAAAZWljYXIuY29tWDVPIVAlQEFQ
+WzRcUFpYNTQoUF4pN0NDKTd9JEVJQ0FSLVNUQU5EQVJELUFOVElWSVJVUy1URVNU
+LUZJTEUhJEgrSCpQSwECFAAKAAAAAADgmLgoPM9RaEQAAABEAAAACQAAAAAAAAAB
+ACAA/4EAAAAAZWljYXIuY29tUEsFBgAAAAABAAEANwAAAGsAAAAAAA==
+
+
+--emailboundary--
+
+.
+QUIT
+
--- a/test/email-templates/existing-alias-external.txt
+++ b/test/email-templates/existing-alias-external.txt
@ -0,0 +1,12 @@
+HELO mail.external.tld
+MAIL FROM: user@external.tld
+RCPT TO: alias1@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <alias1@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+This is a test mail.
+
+.
+QUIT
--- a/test/email-templates/existing-alias-local.txt
+++ b/test/email-templates/existing-alias-local.txt
@ -0,0 +1,12 @@
+HELO mail.external.tld
+MAIL FROM: user@external.tld
+RCPT TO: alias2@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <alias2@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+This is a test mail.
+
+.
+QUIT
--- a/test/email-templates/existing-user.txt
+++ b/test/email-templates/existing-user.txt
@ -0,0 +1,12 @@
+HELO mail.external.tld
+MAIL FROM: user@external.tld
+RCPT TO: user1@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <user1@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+This is a test mail.
+
+.
+QUIT
--- a/test/email-templates/non-existing-user.txt
+++ b/test/email-templates/non-existing-user.txt
@ -0,0 +1,12 @@
+HELO mail.external.tld
+MAIL FROM: user@external.tld
+RCPT TO: nouser@localhost.localdomain
+DATA
+From: Docker Mail Server <dockermailserver@external.tld>
+To: Existing Local User <user1@localhost.localdomain>
+Date: Sat, 22 May 2010 07:43:25 -0400
+Subject: Test Message
+This is a test mail.
+
+.
+QUIT
--- a/test/main.cf
+++ b/test/main.cf
@ -0,0 +1,2 @@
+max_idle = 600s
+readme_directory = /tmp
--- a/test/tests.bats
+++ b/test/tests.bats
@ -0,0 +1,383 @@
+#
+# processes
+#
+
+@test "checking process: postfix" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/postfix/master'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: saslauthd" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/saslauthd'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: clamd" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/clamd'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: new" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/amavisd-new'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: opendkim" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/opendkim'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: opendmarc" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/opendmarc'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: fail2ban (disabled in default configuration)" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/bin/python /usr/bin/fail2ban-server'"
+  [ "$status" -eq 1 ]
+}
+
+@test "checking process: fail2ban (fail2ban server enabled)" {
+  run docker exec mail_fail2ban /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/bin/python /usr/bin/fail2ban-server'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: courierpop3d (disabled in default configuration)" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/courierpop3d'"
+  [ "$status" -eq 1 ]
+}
+
+@test "checking process: courierpop3d (pop3 server enabled)" {
+  run docker exec mail_pop3 /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/courierpop3d'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: courierpop3d (disabled using SMTP_ONLY)" {
+  run docker exec mail_smtponly /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/courierpop3d'"
+  [ "$status" -eq 1 ]
+}
+
+
+#
+# imap
+#
+
+@test "checking process: courier imaplogin (enabled in default configuration)" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/imaplogin'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: courier imaplogin (disabled using SMTP_ONLY)" {
+  run docker exec mail_smtponly /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/imaplogin'"
+  [ "$status" -eq 1 ]
+}
+
+@test "checking imap: server is ready with STARTTLS" {
+  run docker exec mail /bin/bash -c "nc -w 1 0.0.0.0 143 | grep '* OK' | grep 'STARTTLS' | grep 'Courier-IMAP ready'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking imap: authentication works" {
+  run docker exec mail /bin/sh -c "nc -w 1 0.0.0.0 143 < /tmp/test/auth/imap-auth.txt"
+  [ "$status" -eq 0 ]
+}
+
+#
+# pop
+#
+
+@test "checking pop: server is ready" {
+  run docker exec mail_pop3 /bin/bash -c "nc -w 1 0.0.0.0 110 | grep '+OK'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking pop: authentication works" {
+  run docker exec mail_pop3 /bin/sh -c "nc -w 1 0.0.0.0 110 < /tmp/test/auth/pop3-auth.txt"
+  [ "$status" -eq 0 ]
+}
+
+#
+# sasl
+#
+
+@test "checking sasl: testsaslauthd works with good password" {
+  run docker exec mail /bin/sh -c "testsaslauthd -u user2 -r otherdomain.tld -p mypassword | grep 'OK \"Success.\"'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking sasl: testsaslauthd fails with bad password" {
+  run docker exec mail /bin/sh -c "testsaslauthd -u user2 -r otherdomain.tld -p BADPASSWORD | grep 'NO \"authentication failed\"'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking sasl: sasl_passwd.db exists" {
+  run docker exec mail [ -f /etc/postfix/sasl_passwd.db ]
+  [ "$status" -eq 0 ]
+}
+
+#
+# logs
+#
+
+@test "checking logs: mail related logs should be located in a subdirectory" {
+  run docker exec mail /bin/sh -c "ls -1 /var/log/mail/ | grep -E 'clamav|freshclam|mail'|wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 3 ]
+}
+
+#
+# smtp
+#
+
+@test "checking smtp: authentication works with good password (plain)" {
+  run docker exec mail /bin/sh -c "nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-plain.txt | grep 'Authentication successful'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking smtp: authentication fails with wrong password (plain)" {
+  run docker exec mail /bin/sh -c "nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-plain-wrong.txt | grep 'authentication failed'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking smtp: authentication works with good password (login)" {
+  run docker exec mail /bin/sh -c "nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-login.txt | grep 'Authentication successful'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking smtp: authentication fails with wrong password (login)" {
+  run docker exec mail /bin/sh -c "nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-login-wrong.txt | grep 'authentication failed'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking smtp: delivers mail to existing account" {
+  run docker exec mail /bin/sh -c "grep 'status=sent (delivered to maildir)' /var/log/mail/mail.log | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" -eq 2 ]
+}
+
+@test "checking smtp: delivers mail to existing alias" {
+  run docker exec mail /bin/sh -c "grep 'to=<user1@localhost.localdomain>, orig_to=<alias1@localhost.localdomain>' /var/log/mail/mail.log | grep 'status=sent' | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 1 ]
+}
+
+@test "checking smtp: user1 should have received 2 mails" {
+  run docker exec mail /bin/sh -c "ls -A /var/mail/localhost.localdomain/user1/new | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 2 ]
+}
+
+@test "checking smtp: rejects mail to unknown user" {
+  run docker exec mail /bin/sh -c "grep '<nouser@localhost.localdomain>: Recipient address rejected: User unknown in virtual mailbox table' /var/log/mail/mail.log | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 1 ]
+}
+
+@test "checking smtp: redirects mail to external alias" {
+  run docker exec mail /bin/sh -c "grep -- '-> <external1@otherdomain.tld>' /var/log/mail/mail.log | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 1 ]
+}
+
+@test "checking smtp: rejects spam" {
+  run docker exec mail /bin/sh -c "grep 'Blocked SPAM' /var/log/mail/mail.log | grep spam@external.tld | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 1 ]
+}
+
+@test "checking smtp: rejects virus" {
+  run docker exec mail /bin/sh -c "grep 'Blocked INFECTED' /var/log/mail/mail.log | grep virus@external.tld | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" = 1 ]
+}
+
+#
+# accounts
+#
+
+@test "checking accounts: user accounts" {
+  run docker exec mail sasldblistusers2
+  [ "$status" -eq 0 ]
+  [ "${lines[0]}" = "user1@localhost.localdomain: userPassword" ]
+  [ "${lines[1]}" = "user2@otherdomain.tld: userPassword" ]
+}
+
+@test "checking accounts: user mail folders for user1" {
+  run docker exec mail ls -A /var/mail/localhost.localdomain/user1
+  [ "$status" -eq 0 ]
+  [ "${lines[0]}" = ".Drafts" ]
+  [ "${lines[1]}" = ".Sent" ]
+  [ "${lines[2]}" = ".Trash" ]
+  [ "${lines[3]}" = "courierimapsubscribed" ]
+  [ "${lines[4]}" = "cur" ]
+  [ "${lines[5]}" = "new" ]
+  [ "${lines[6]}" = "tmp" ]
+}
+
+@test "checking accounts: user mail folders for user2" {
+  run docker exec mail ls -A /var/mail/otherdomain.tld/user2
+  [ "$status" -eq 0 ]
+  [ "${lines[0]}" = ".Drafts" ]
+  [ "${lines[1]}" = ".Sent" ]
+  [ "${lines[2]}" = ".Trash" ]
+  [ "${lines[3]}" = "courierimapsubscribed" ]
+  [ "${lines[4]}" = "cur" ]
+  [ "${lines[5]}" = "new" ]
+  [ "${lines[6]}" = "tmp" ]
+}
+
+#
+# postfix
+#
+
+@test "checking postfix: vhost file is correct" {
+  run docker exec mail cat /etc/postfix/vhost
+  [ "$status" -eq 0 ]
+  [ "${lines[0]}" = "localhost.localdomain" ]
+  [ "${lines[1]}" = "otherdomain.tld" ]
+}
+
+@test "checking postfix: main.cf overrides" {
+  run docker exec mail grep -q 'max_idle = 600s' /tmp/postfix/main.cf
+  [ "$status" -eq 0 ]
+  run docker exec mail grep -q 'readme_directory = /tmp' /tmp/postfix/main.cf
+  [ "$status" -eq 0 ]
+}
+
+#
+# spamassassin
+#
+
+@test "checking spamassassin: docker env variables are set correctly (default)" {
+  run docker exec mail_pop3 /bin/sh -c "grep '\$sa_tag_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 2.0'"
+  [ "$status" -eq 0 ]
+  run docker exec mail_pop3 /bin/sh -c "grep '\$sa_tag2_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 6.31'"
+  [ "$status" -eq 0 ]
+  run docker exec mail_pop3 /bin/sh -c "grep '\$sa_kill_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 6.31'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking spamassassin: docker env variables are set correctly (custom)" {
+  run docker exec mail /bin/sh -c "grep '\$sa_tag_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 1.0'"
+  [ "$status" -eq 0 ]
+  run docker exec mail /bin/sh -c "grep '\$sa_tag2_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 2.0'"
+  [ "$status" -eq 0 ]
+  run docker exec mail /bin/sh -c "grep '\$sa_kill_level_deflt' /etc/amavis/conf.d/20-debian_defaults | grep '= 3.0'"
+  [ "$status" -eq 0 ]
+}
+
+#
+# opendkim
+#
+
+@test "checking opendkim: /etc/opendkim/KeyTable should contain 2 entries" {
+  run docker exec mail /bin/sh -c "cat /etc/opendkim/KeyTable | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" -eq 2 ]
+}
+
+@test "checking opendkim: /etc/opendkim/keys/ should contain 2 entries" {
+  run docker exec mail /bin/sh -c "ls -l /etc/opendkim/keys/ | grep '^d' | wc -l"
+  [ "$status" -eq 0 ]
+  [ "$output" -eq 2 ]
+}
+
+#
+# opendmarc
+#
+
+@test "checking opendkim: server fqdn should be added to /etc/opendmarc.conf as AuthservID" {
+  run docker exec mail grep ^AuthservID /etc/opendmarc.conf
+  [ "$status" -eq 0 ]
+  [ "$output" = "AuthservID mail.my-domain.com" ]
+}
+
+@test "checking opendkim: server fqdn should be added to /etc/opendmarc.conf as TrustedAuthservIDs" {
+  run docker exec mail grep ^TrustedAuthservID /etc/opendmarc.conf
+  [ "$status" -eq 0 ]
+  [ "$output" = "TrustedAuthservIDs mail.my-domain.com" ]
+}
+
+#
+# letsencrypt
+#
+
+@test "checking letsencrypt: lets-encrypt-x1-cross-signed.pem is installed" {
+  run docker exec mail grep 'BEGIN CERTIFICATE' /etc/ssl/certs/lets-encrypt-x1-cross-signed.pem
+  [ "$status" -eq 0 ]
+}
+
+@test "checking letsencrypt: lets-encrypt-x2-cross-signed.pem is installed" {
+  run docker exec mail grep 'BEGIN CERTIFICATE' /etc/ssl/certs/lets-encrypt-x2-cross-signed.pem
+  [ "$status" -eq 0 ]
+}
+
+#
+# ssl
+#
+
+@test "checking ssl: generated default cert is installed" {
+  run docker exec mail /bin/sh -c "openssl s_client -connect 0.0.0.0:587 -starttls smtp -CApath /etc/ssl/certs/ | grep 'Verify return code: 0 (ok)'"
+  [ "$status" -eq 0 ]
+}
+
+#
+# fail2ban
+#
+
+@test "checking fail2ban: localhost is not banned" {
+  run docker exec mail_fail2ban /bin/sh -c "fail2ban-client status sasl | grep 'IP list:.*127.0.0.1'"
+  [ "$status" -eq 1 ]
+}
+
+@test "checking fail2ban: ban ip on multiple failed login" {
+  docker exec mail_fail2ban fail2ban-client status sasl
+  docker exec mail_fail2ban fail2ban-client set sasl delignoreip 127.0.0.1/8
+  docker exec mail_fail2ban /bin/sh -c 'nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-login-wrong.txt'
+  docker exec mail_fail2ban /bin/sh -c 'nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-login-wrong.txt'
+  docker exec mail_fail2ban /bin/sh -c 'nc -w 1 0.0.0.0 25 < /tmp/test/auth/smtp-auth-login-wrong.txt'
+  sleep 5
+  run docker exec mail_fail2ban /bin/sh -c "fail2ban-client status sasl | grep 'IP list:.*127.0.0.1'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking fail2ban: unban ip works" {
+  docker exec mail_fail2ban fail2ban-client set sasl addignoreip 127.0.0.1/8
+  docker exec mail_fail2ban fail2ban-client set sasl unbanip 127.0.0.1
+  sleep 5
+  run docker exec mail_fail2ban /bin/sh -c "fail2ban-client status sasl | grep 'IP list:.*127.0.0.1'"
+  [ "$status" -eq 1 ]
+}
+
+#
+# system
+#
+
+@test "checking system: freshclam cron is enabled" {
+  run docker exec mail crontab -l
+  [ "$status" -eq 0 ]
+  [ "$output" = "0 1 * * * /usr/bin/freshclam --quiet" ]
+}
+
+@test "checking system: /var/log/mail/mail.log is error free" {
+  run docker exec mail grep 'non-null host address bits in' /var/log/mail/mail.log
+  [ "$status" -eq 1 ]
+  run docker exec mail grep ': error:' /var/log/mail/mail.log
+  [ "$status" -eq 1 ]
+  run docker exec mail_pop3 grep 'non-null host address bits in' /var/log/mail/mail.log
+  [ "$status" -eq 1 ]
+  run docker exec mail_pop3 grep ': error:' /var/log/mail/mail.log
+  [ "$status" -eq 1 ]
+}
+
+@test "checking system: sets the server fqdn" {
+  run docker exec mail hostname
+  [ "$status" -eq 0 ]
+  [ "$output" = "mail.my-domain.com" ]
+}
+
+@test "checking system: sets the server domain name in /etc/mailname" {
+  run docker exec mail cat /etc/mailname
+  [ "$status" -eq 0 ]
+  [ "$output" = "my-domain.com" ]
+}
--- a/test/virtual
+++ b/test/virtual
@ -0,0 +1,2 @@
+alias1@localhost.localdomain user1@localhost.localdomain
+alias2@localhost.localdomain external1@otherdomain.tld