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catatnight / docker-postfix

run postfix with smtp authentication (sasldb) in a docker container
MIT License
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docker-postfix

run postfix with smtp authentication (sasldb) in a docker container. TLS and OpenDKIM support are optional.

Requirement

Installation

  1. Build image

    $ sudo docker pull catatnight/postfix

Usage

  1. Create postfix container with smtp authentication

    $ sudo docker run -p 25:25 \
        -e maildomain=mail.example.com -e smtp_user=user:pwd \
        --name postfix -d catatnight/postfix
# Set multiple user credentials: -e smtp_user=user1:pwd1,user2:pwd2,...,userN:pwdN

  2. Enable OpenDKIM: save your domain key .private in /path/to/domainkeys

    $ sudo docker run -p 25:25 \
        -e maildomain=mail.example.com -e smtp_user=user:pwd \
        -v /path/to/domainkeys:/etc/opendkim/domainkeys \
        --name postfix -d catatnight/postfix

  3. Enable TLS(587): save your SSL certificates .key and .crt to /path/to/certs

    $ sudo docker run -p 587:587 \
        -e maildomain=mail.example.com -e smtp_user=user:pwd \
        -v /path/to/certs:/etc/postfix/certs \
        --name postfix -d catatnight/postfix

Note

Reference