Postfix docker container (intended as a backup MX or for testing)
Creates a Docker Image of Postfix. The Primary intention is to use this image as a backup MX, testing email sending, or as a relay where needed.
On every start, the container will re-run the transport postmap. So if you need to change your transport maps, you just need to do a docker compose down and up.
There is a sample docker-compose.yml for your convenience.
Volumes you may want to map are:
- /var/spool/postfix (Mail Queues)
- /config (Basic Config Files)
Optional
- /var/log (Log Files)
- /etc/postfix (ALL Config Directory)
Ports to expose
- 25 (SMTP relay)
- 587 (Mail submission)