ntninja/alpine-dovecot repository overview

Note: This container is automatically built by docker-image-rebuilder⁠ every night and will receive updates whenever the upstream Alpine packages change. (Dockerfile)⁠

Dovecot as packaged by the most recent version of the Alpine Linux distribution including all available plugins:

• pigeonhole (ManageSieve support, mail delivery and IMAP filtering plugins)
• pgsql, mysql & sqlite (Database user authentication and processing)
• gssapi & ldap (User authentication)

The popular antispam plugin is not included as its functionality can now be implemented using the more flexible IMAPSieve plugin⁠.

⁠Quick Start

Only very minimal modifications to the Dovecot configuration are done during build:

• Default user provider is passwdfile instead of system (which is useless in a container)
• Log to stdout and stderr instead of syslog
• Default mail location is set to /var/lib/mail

This is sufficient a simple mail retrieval agent setup:

1. Create an user account file named user in there directory where you would like to run Dovecot and add some entries:

   Copy

user1:$6$qhUUeSCTt3XxjhkF$NCfmhmfcjoAnSuxjHlw1.vlTVrr1xAWBPaV67q.bZe0PR8GqogWgf.m84Tk5NCJ5CfXdqcw4JpBfuEBvL1/bG1:1000:1000:::: user2:$6$CGXjhMNcTinLPHv9$xzslza5p0191dstyXqcDmSp1Ef7ofK4UBuT1yQ6AS.2YZ1zbQlw6BepEMhWznGAjuppr.U/zHLqpfdSK5G.t8/:1001:1001::::

    The format basic format is `<username>:<password-crypt>:<uid>:<gid>::::`, for details see [the documentation](https://wiki.dovecot.org/AuthDatabase/PasswdFile). (Please don't reuse the above "hackme" password entries, thx.)

 2. Run the container with the required volumes set:

    ```
docker run -v "${PWD}/mail:/var/lib/mail" \
                -v "${PWD}/keys:/etc/ssl/dovecot" \
                -v "${PWD}/users:/etc/dovecot/users:ro" ntninja/alpine-dovecot

1. Done!

⁠Advanced Usage

If you want to modify Dovecot's configuration, it is usually easiest to copy the entire configuration from the image before making changes:

docker pull ntninja/alpine-dovecot
container_id="$(docker container create ntninja/alpine-dovecot)"
docker cp "${container_id}:/etc/dovecot" dovecot-config
docker container rm "${container_id}"

The Dovecot configuration files should now be in the dovecot-config folder inside the current directory and can be mounted as a volume when starting the container.