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312 lines
9.8 KiB
Markdown
312 lines
9.8 KiB
Markdown
# docker-mailserver
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[](https://travis-ci.org/tomav/docker-mailserver) [](https://hub.docker.com/r/tvial/docker-mailserver/) [](https://github.com/tomav/docker-mailserver/) [](https://github.com/tomav/docker-mailserver/) [](https://github.com/tomav/docker-mailserver/)
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A fullstack but simple mail server (smtp, imap, antispam, antivirus...).
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Only configuration files, no SQL database. Keep it simple and versioned.
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Easy to deploy and upgrade.
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Includes:
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- postfix with smtp or ldap auth
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- dovecot for sasl, imap (and optional pop3) with ssl support, with ldap auth
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- saslauthd with ldap auth
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- amavis
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- spamassasin supporting custom rules
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- clamav with automatic updates
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- opendkim
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- opendmarc
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- fail2ban
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- fetchmail
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- basic [sieve support](https://github.com/tomav/docker-mailserver/wiki/Configure-Sieve-filters) using dovecot
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- [LetsEncrypt](https://letsencrypt.org/) and self-signed certificates
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- persistent data and state (but think about backups!)
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- [integration tests](https://travis-ci.org/tomav/docker-mailserver)
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- [automated builds on docker hub](https://hub.docker.com/r/tvial/docker-mailserver/)
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Why I created this image: [Simple mail server with Docker](http://tvi.al/simple-mail-server-with-docker/)
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Before you open an issue, please have a look this `README`, the [Wiki](https://github.com/tomav/docker-mailserver/wiki/) and Postfix/Dovecot documentation.
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## Usage
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#### Get latest image
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docker pull tvial/docker-mailserver:latest
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#### Create a `docker-compose.yml`
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Adapt this file with your FQDN. Install [docker-compose](https://docs.docker.com/compose/) in the version `1.6` or higher.
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Your configs must be mounted in `/tmp/docker-mailserver/`. To understand how things work on boot, please have a look to [start-mailserver.sh](https://github.com/tomav/docker-mailserver/blob/master/target/start-mailserver.sh)
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```yaml
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version: '2'
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services:
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mail:
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image: tvial/docker-mailserver:2.1
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hostname: mail
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domainname: domain.com
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container_name: mail
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ports:
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- "25:25"
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- "143:143"
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- "587:587"
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- "993:993"
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volumes:
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- maildata:/var/mail
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- mailstate:/var/mail-state
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- ./config/:/tmp/docker-mailserver/
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environment:
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- ENABLE_SPAMASSASSIN=1
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- ENABLE_CLAMAV=1
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- ENABLE_FAIL2BAN=1
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- ONE_DIR=1
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- DMS_DEBUG=0
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cap_add:
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- NET_ADMIN
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volumes:
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maildata:
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driver: local
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mailstate:
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driver: local
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```
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#### Create your mail accounts
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Don't forget to adapt MAIL_USER and MAIL_PASS to your needs
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mkdir -p config
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touch config/postfix-accounts.cf
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docker run --rm \
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-e MAIL_USER=user1@domain.tld \
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-e MAIL_PASS=mypassword \
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-ti tvial/docker-mailserver:latest \
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/bin/sh -c 'echo "$MAIL_USER|$(doveadm pw -s SHA512-CRYPT -u $MAIL_USER -p $MAIL_PASS)"' >> config/postfix-accounts.cf
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#### Generate DKIM keys
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docker run --rm \
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-v "$(pwd)/config":/tmp/docker-mailserver \
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-ti tvial/docker-mailserver:latest generate-dkim-config
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Now the keys are generated, you can configure your DNS server by just pasting the content of `config/opendkim/keys/domain.tld/mail.txt` in your `domain.tld.hosts` zone.
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Note: you can also manage email accounts, DKIM keys and more with the [setup.sh convenience script](https://github.com/tomav/docker-mailserver/wiki/Setup-docker-mailserver-using-the-script-setup.sh).
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#### Start the container
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docker-compose up -d mail
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You're done!
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## Environment variables
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Please check [how the container starts](https://github.com/tomav/docker-mailserver/blob/master/target/start-mailserver.sh) to understand what's expected.
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Value in **bold** is the default value.
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##### DMS_DEBUG
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- **0** => Debug disabled
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- 1 => Enables debug on startup
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#### ENABLE_CLAMAV
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- **0** => Clamav is disabled
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- 1 => Clamav is enabled
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#### ENABLE_SPAMASSASSIN
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- **0** => Spamassassin is disabled
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- 1 => Spamassassin is enabled
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##### SA_TAG
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- **2.0** => add spam info headers if at, or above that level
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Note: this spamassassin setting needs `ENABLE_SPAMASSASSIN=1`
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##### SA_TAG2
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- **6.31** => add 'spam detected' headers at that level
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Note: this spamassassin setting needs `ENABLE_SPAMASSASSIN=1`
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##### SA_KILL
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- **6.31** => triggers spam evasive actions
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Note: this spamassassin setting needs `ENABLE_SPAMASSASSIN=1`
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##### ONE_DIR
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- **0** => state in default directories
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- 1 => consolidate all states into a single directory (`/var/mail-state`) to allow persistence using docker volumes
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##### ENABLE_POP3
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- **empty** => POP3 service disabled
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- 1 => Enables POP3 service
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##### ENABLE_FAIL2BAN
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- **0** => fail2ban service disabled
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- 1 => Enables fail2ban service
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If you enable Fail2Ban, don't forget to add the following lines to your `docker-compose.yml`:
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cap_add:
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- NET_ADMIN
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Otherwise, `iptables` won't be able to ban IPs.
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##### ENABLE_MANAGESIEVE
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- **empty** => Managesieve service disabled
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- 1 => Enables Managesieve on port 4190
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##### ENABLE_FETCHMAIL
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- **0** => `fetchmail` disabled
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- 1 => `fetchmail` enabled
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##### ENABLE_LDAP
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- **empty** => LDAP authentification is disabled
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- 1 => LDAP authentification is enabled
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- NOTE:
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- A second container for the ldap service is necessary (e.g. [docker-openldap](https://github.com/osixia/docker-openldap))
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- For preparing the ldap server to use in combination with this continer [this](http://acidx.net/wordpress/2014/06/installing-a-mailserver-with-postfix-dovecot-sasl-ldap-roundcube/) article may be helpful
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##### LDAP_SERVER_HOST
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- **empty** => mail.domain.com
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- => Specify the dns-name/ip-address where the ldap-server
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- NOTE: If you going to use the mailserver in combination with docker-compose you can set the service name here
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##### LDAP_SEARCH_BASE
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- **empty** => ou=people,dc=domain,dc=com
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- => e.g. LDAP_SEARCH_BASE=dc=mydomain,dc=local
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##### LDAP_BIND_DN
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- **empty** => cn=admin,dc=domain,dc=com
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- => take a look at examples of SASL_LDAP_BIND_DN
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##### LDAP_BIND_PW
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- **empty** => admin
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- => Specify the password to bind against ldap
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##### OVERRIDE_HOSTNAE
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- **empty** => uses the `hostname` command to get the mail server's canonical hostname
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- => Specify a fully-qualified domainname to serve mail for. This is used for many of the config features so if you can't set your hostname (e.g. you're in a container platform that doesn't let you) specify it in this environment variable.
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##### POSTMASTER_ADDRESS
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- **empty** => postmaster@domain.com
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- => Specify the postmaster address
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##### ENABLE_SASLAUTHD
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- **0** => `saslauthd` is disabled
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- 1 => `saslauthd` is enabled
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##### SASLAUTHD_MECHANISMS
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- empty => pam
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- ldap => authenticate against ldap server
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- shadow => authenticate against local user db
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- mysql => authenticate against mysql db
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- rimap => authenticate against imap server
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- NOTE: can be a list of mechanisms like pam ldap shadow
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##### SASLAUTHD_MECH_OPTIONS
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- empty => None
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- e.g. with SASLAUTHD_MECHANISMS rimap you need to specify the ip-address/servername of the imap server ==> xxx.xxx.xxx.xxx
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##### SASLAUTHD_LDAP_SERVER
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- empty => localhost
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##### SASLAUTHD_LDAP_SSL
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- empty or 0 => ldap:// will be used
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- 1 => ldaps:// will be used
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##### SASLAUTHD_LDAP_BIND_DN
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- empty => anonymous bind
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- specify an object with priviliges to search the directory tree
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- e.g. active directory: SASLAUTHD_LDAP_BIND_DN=cn=Administrator,cn=Users,dc=mydomain,dc=net
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- e.g. openldap: SASLAUTHD_LDAP_BIND_DN=cn=admin,dc=mydomain,dc=net
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##### SASLAUTHD_LDAP_PASSWORD
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- empty => anonymous bind
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##### SASLAUTHD_LDAP_SEARCH_BASE
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- empty => Reverting to SASLAUTHD_MECHANISMS pam
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- specify the search base
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##### SASLAUTHD_LDAP_FILTER
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- empty => default filter (&(uniqueIdentifier=%u)(mailEnabled=TRUE))
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- e.g. for active directory: (&(sAMAccountName=%U)(objectClass=person))
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- e.g. for openldap: (&(uid=%U)(objectClass=person))
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##### SASL_PASSWD
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- **empty** => No sasl_passwd will be created
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- string => `/etc/postfix/sasl_passwd` will be created with the string as password
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##### SMTP_ONLY
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- **empty** => all daemons start
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- 1 => only launch postfix smtp
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##### SSL_TYPE
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- **empty** => SSL disabled
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- letsencrypt => Enables Let's Encrypt certificates
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- custom => Enables custom certificates
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- manual => Let's you manually specify locations of your SSL certificates for non-standard cases
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- self-signed => Enables self-signed certificates
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Please read [the SSL page in the wiki](https://github.com/tomav/docker-mailserver/wiki/Configure-SSL) for more information.
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##### PERMIT_DOCKER
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Set different options for mynetworks option (can be overwrite in postfix-main.cf)
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- **empty** => localhost only
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- host => Add docker host (ipv4 only)
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- network => Add all docker containers (ipv4 only)
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##### VIRUSMAILS_DELETE_DELAY
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Set how many days a virusmail will stay on the server before being deleted
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- **empty** => 7 days
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##### ENABLE_POSTFIX_VIRTUAL_TRANSPORT
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This Option is activating the Usage of POSTFIX_DAGENT to specify a ltmp client different from default dovecot socket.
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- **empty** => disabled
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- 1 => enabled
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##### POSTFIX_DAGENT
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Enabled by ENABLE_POSTFIX_VIRTUAL_TRANSPORT. Specify the final delivery of postfix
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- **empty**: fail
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- lmtp:unix:private/dovecot-lmtp (use socket)
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- lmtps:inet:<host>:<port> (secure lmtp with starttls, take a look at https://sys4.de/en/blog/2014/11/17/sicheres-lmtp-mit-starttls-in-dovecot/)
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- lmtp:<kopano-host>:2003 (use kopano as mailstore)
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- etc.
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