Merge pull request #123 from 00angus/v2

Dovecot based mailserver (#109)

Dockerfile

@@ -4,20 +4,16 @@ 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 sasl2-bin courier-imap courier-imap-ssl \
+RUN DEBIAN_FRONTEND=noninteractive apt-get -y install vim postfix dovecot-core dovecot-imapd dovecot-pop3d \
-    courier-pop courier-pop-ssl courier-authdaemon supervisor gamin amavisd-new spamassassin clamav clamav-daemon libnet-dns-perl libmail-spf-perl \
+    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 Saslauthd
+# Configures Dovecot
-RUN rm -rf /var/run/saslauthd && ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd
+RUN sed -i -e 's/include_try \/usr\/share\/dovecot\/protocols\.d/include_try \/etc\/dovecot\/protocols\.d/g' /etc/dovecot/dovecot.conf
-RUN adduser postfix sasl
+ADD dovecot/auth-passwdfile.inc /etc/dovecot/conf.d/
-RUN echo 'NAME="saslauthd"\nSTART=yes\nMECHANISMS="sasldb"\nTHREADS=0\nPWDIR=/var/spool/postfix/var/run/saslauthd\nPIDFILE="${PWDIR}/saslauthd.pid"\nOPTIONS="-n 0 -c -m /var/spool/postfix/var/run/saslauthd"' > /etc/default/saslauthd
+ADD dovecot/10-*.conf /etc/dovecot/conf.d/
-
-# Configures Courier
-RUN sed -i -r 's/daemons=5/daemons=1/g' /etc/courier/authdaemonrc
-RUN sed -i -r 's/authmodulelist="authpam"/authmodulelist="authuserdb"/g' /etc/courier/authdaemonrc
 
 # Enables Spamassassin and CRON updates
 RUN sed -i -r 's/^(CRON|ENABLED)=0/\1=1/g' /etc/default/spamassassin
@@ -47,7 +43,6 @@ 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 postfix/sasl/smtpd.conf /etc/postfix/sasl/smtpd.conf
 ADD bin/generate-ssl-certificate /usr/local/bin/generate-ssl-certificate
 RUN chmod +x /usr/local/bin/generate-ssl-certificate
 

Makefile

@@ -1,7 +1,8 @@
-NAME = tvial/docker-mailserver
+NAME = tvial/docker-mailserver:dovecot
 
-all: build run fixtures tests clean
+#all: build run fixtures tests clean
-all-no-build: run fixtures tests clean
+#all-no-build: run fixtures tests clean
+all: build 
 
 build:
 	docker build --no-cache -t $(NAME) . 

README.md

@@ -9,7 +9,7 @@ Easy to deploy and upgrade.
 Includes:
 
 - postfix with smtp auth
-- courier-imap with ssl support
+- dovecot for sasl, imap (and optional pop3) with ssl support
 - amavis
 - spamassasin supporting custom rules
 - clamav with automatic updates
@@ -17,7 +17,6 @@ Includes:
 - opendmarc 
 - fail2ban
 - [LetsEncrypt](https://letsencrypt.org/) and self-signed certificates
-- optional pop3 server
 - [integration tests](https://travis-ci.org/tomav/docker-mailserver) 
 - [automated builds on docker hub](https://hub.docker.com/r/tvial/docker-mailserver/)
 
@@ -45,7 +44,7 @@ Before you open an issue, please have a look this `README`, the [FAQ](https://gi
       - ./spamassassin:/tmp/spamassassin/
       - ./postfix:/tmp/postfix/
 
-    # start he container
+    # start the container
   	docker-compose up -d mail
 
 ## Managing users and aliases
@@ -53,12 +52,22 @@ Before you open an issue, please have a look this `README`, the [FAQ](https://gi
 ### Users
 
 Users are managed in `postfix/accounts.cf`.  
-Just add the full email address and its password separated by a pipe.  
+Just add the full email address and its encrypted password separated by a pipe.  
 
 Example:
 
-    user1@domain.tld|mypassword
+    user1@domain.tld|mypassword-encrypted
-    user2@otherdomain.tld|myotherpassword
+    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
 

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

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: %$

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}

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 = 
+  }
+}

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 =

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
+  #}
+}

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
+}

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

postfix/main.cf

@@ -40,11 +40,10 @@ smtpd_tls_exclude_ciphers = aNULL, LOW, EXP, MEDIUM, ADH, AECDH, MD5, DSS, ECDSA
 
 # SASL
 smtpd_sasl_auth_enable = yes
-smtpd_sasl_path = smtpd
+smtpd_sasl_path = private/auth
-smtpd_sasl_type = cyrus
+smtpd_sasl_type = dovecot
 smtpd_sasl_security_options = noanonymous
 smtpd_sasl_local_domain = $myhostname
-cyrus_sasl_config_path = /etc/postfix/sasl
 broken_sasl_auth_clients = yes
 
 # Mail directory

postfix/master.cf

@@ -15,9 +15,10 @@ 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_relay_restrictions=permit_sasl_authenticated,reject
   -o smtpd_client_restrictions=permit_sasl_authenticated,reject
   -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
   -o milter_macro_daemon_name=ORIGINATING

postfix/sasl/smtpd.conf

@@ -1,4 +0,0 @@
-pwcheck_method: auxprop
-auxprop_plugin: sasldb
-mech_list: PLAIN LOGIN CRAM-MD5 DIGEST-MD5
-log_level: 7

start-mailserver.sh

@@ -11,8 +11,20 @@ if [ -f /tmp/postfix/accounts.cf ]; then
 
   # 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=$'|' read login pass
   do
     # Setting variables for better readability
@@ -21,22 +33,22 @@ if [ -f /tmp/postfix/accounts.cf ]; then
     # Let's go!
     echo "user '${user}' for domain '${domain}' with password '********'"
     echo "${login} ${domain}/${user}/" >> /etc/postfix/vmailbox
-    /usr/sbin/userdb ${login} set uid=5000 gid=5000 home=/var/mail/${domain}/${user} mail=/var/mail/${domain}/${user}
+    # user database for dovecot has the following format:
-    echo "${pass}" | userdbpw -md5 | userdb ${login} set systempw
+    # user:password:uid:gid:(gecos):home:(shell):extra_fields
-    echo "${pass}" | saslpasswd2 -p -c -u ${domain} ${login}
+    # 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}/${user}" ]; then
-      maildirmake "/var/mail/${domain}/${user}"
+      maildirmake.dovecot "/var/mail/${domain}/${user}"
-      maildirmake "/var/mail/${domain}/${user}/.Sent"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Sent"
-      maildirmake "/var/mail/${domain}/${user}/.Trash"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Trash"
-      maildirmake "/var/mail/${domain}/${user}/.Drafts"
+      maildirmake.dovecot "/var/mail/${domain}/${user}/.Drafts"
-      echo -e "INBOX\nINBOX.Sent\nINBOX.Trash\nInbox.Drafts" >> "/var/mail/${domain}/${user}/courierimapsubscribed"
+      echo -e "INBOX\nSent\nTrash\nDrafts" >> "/var/mail/${domain}/${user}/subscriptions"
       touch "/var/mail/${domain}/${user}/.Sent/maildirfolder"
 
     fi
     echo ${domain} >> /tmp/vhost.tmp
   done < /tmp/postfix/accounts.cf
-  makeuserdb
 else
   echo "==> Warning: '/tmp/postfix/accounts.cf' is not provided. No mail account created."
 fi
@@ -47,8 +59,10 @@ if [ -f /tmp/postfix/virtual ]; then
   while IFS=$' ' read from to
   do
     # Setting variables for better readability
+    uname=$(echo ${from} | cut -d @ -f1)
     domain=$(echo ${from} | cut -d @ -f2)
-    echo ${domain} >> /tmp/vhost.tmp
+    # if they are equal it means the line looks like: "user1     other@domain.tld"
+    test "$uname" != "$domain" && echo ${domain} >> /tmp/vhost.tmp
   done < /tmp/postfix/virtual
 else
   echo "==> Warning: '/tmp/postfix/virtual' is not provided. No mail alias created."
@@ -63,6 +77,12 @@ 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/$domainname/mail.private" ]; then
@@ -96,6 +116,7 @@ grep -vE '^(\s*$|#)' /etc/postfix/vhost | while read domainname; do
       fi
     fi
   done
+fi
 
 echo "Changing permissions on /etc/opendkim"
 # chown entire directory
@@ -104,7 +125,7 @@ chown -R opendkim:opendkim /etc/opendkim/
 chmod -R 0700 /etc/opendkim/keys/
 
 # DMARC
-# if ther is no AuthservID create it
+# 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
@@ -125,20 +146,15 @@ case $DMS_SSL in
     && [ -e "/etc/letsencrypt/live/$(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"
+      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
 
-      # Courier configuration
+      # Dovecot configuration
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/imapd.pem/TLS_CERTFILE=\/etc\/letsencrypt\/live\/'$(hostname)'\/combined.pem/g' /etc/courier/imapd-ssl
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/letsencrypt\/live\/'$(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\/'$(hostname)'\/privkey\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-      # POP3 courier configuration
-      sed -i -r 's/POP3_TLS_REQUIRED=0/POP3_TLS_REQUIRED=1/g' /etc/courier/pop3d-ssl
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/pop3d.pem/TLS_CERTFILE=\/etc\/letsencrypt\/live\/'$(hostname)'\/combined.pem/g' /etc/courier/pop3d-ssl
-      # needed to support gmail
-      sed -i -r 's/TLS_TRUSTCERTS=\/etc\/ssl\/certs/TLS_TRUSTCERTS=\/etc\/letsencrypt\/live\/'$(hostname)'\/fullchain.pem/g' /etc/courier/pop3d-ssl
 
       echo "SSL configured with letsencrypt certificates"
 
@@ -156,12 +172,9 @@ case $DMS_SSL in
       sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/'$(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
 
-      # Courier configuration
+      # Dovecot configuration
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/imapd.pem/TLS_CERTFILE=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/courier/imapd-ssl
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(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\/'$(hostname)'-full\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-      # POP3 courier configuration
-      sed -i -r 's/POP3_TLS_REQUIRED=0/POP3_TLS_REQUIRED=1/g' /etc/courier/pop3d-ssl
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/pop3d.pem/TLS_CERTFILE=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/courier/pop3d-ssl
 
       echo "SSL configured with CA signed/custom certificates"
 
@@ -178,6 +191,8 @@ case $DMS_SSL in
       mkdir -p /etc/postfix/ssl
       cp "/tmp/postfix/ssl/$(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
 
@@ -188,12 +203,9 @@ case $DMS_SSL in
       sed -i -r 's/#smtp_tls_CAfile=/smtp_tls_CAfile=\/etc\/postfix\/ssl\/cacert.pem/g' /etc/postfix/main.cf
       ln -s /etc/postfix/ssl/cacert.pem "/etc/ssl/certs/cacert-$(hostname).pem"
 
-      # Courier configuration
+      # Dovecot configuration
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/imapd.pem/TLS_CERTFILE=\/etc\/postfix\/ssl\/'$(hostname)'-combined.pem/g' /etc/courier/imapd-ssl
+      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(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\/'$(hostname)'-key\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-      # POP3 courier configuration
-      sed -i -r 's/POP3_TLS_REQUIRED=0/POP3_TLS_REQUIRED=1/g' /etc/courier/pop3d-ssl
-      sed -i -r 's/TLS_CERTFILE=\/etc\/courier\/pop3d.pem/TLS_CERTFILE=\/etc\/postfix\/ssl\/'$(hostname)'-combined.pem/g' /etc/courier/pop3d-ssl
 
       echo "SSL configured with self-signed/custom certificates"
 
@@ -224,7 +236,6 @@ fi
 
 echo "Fixing permissions"
 chown -R 5000:5000 /var/mail
-chown postfix.sasl /etc/sasldb2
 
 echo "Creating /etc/mailname"
 echo $(hostname -d) > /etc/mailname
@@ -237,13 +248,36 @@ test -e /tmp/spamassassin/rules.cf && cp /tmp/spamassassin/rules.cf /etc/spamass
 
 echo "Configuring fail2ban"
 # enable filters
-awk 'BEGIN{unit=0}{if ($1=="[postfix]" || $1=="[couriersmtp]" || $1=="[courierauth]" || $1=="[sasl]") {unit=1;}
+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|couriersmtp|courierauth|sasl/) unit=0;
+      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
@@ -268,19 +302,18 @@ 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
+##/etc/init.d/saslauthd start
 
 if [ "$SMTP_ONLY" != 1 ]; then
-
+  # Here we are starting sasl and imap, not pop3 because it's disabled by default
-/etc/init.d/courier-authdaemon start
+  echo " * Starting dovecot services"
-/etc/init.d/courier-imap start
+  /usr/sbin/dovecot -F -c /etc/dovecot/dovecot.conf &
-/etc/init.d/courier-imap-ssl start
-
 fi
+
 if [ "$ENABLE_POP3" = 1 -a "$SMTP_ONLY" != 1 ]; then
   echo "Starting POP3 services"
-  /etc/init.d/courier-pop start
+  mv /etc/dovecot/protocols.d/pop3d.protocol.disab /etc/dovecot/protocols.d/pop3d.protocol
-  /etc/init.d/courier-pop-ssl start
+  /usr/sbin/dovecot reload
 fi
 
 /etc/init.d/spamassassin start
@@ -295,8 +328,8 @@ if [ "$ENABLE_FAIL2BAN" = 1 ]; then
   /etc/init.d/fail2ban start
 fi
 
-echo "Listing SASL users"
+echo "Listing users"
-sasldblistusers2
+/usr/sbin/dovecot user '*'
 
 echo "Starting..."
 tail -f /var/log/mail/mail.log