Hi Hans-Martin,
On Sat, Dec 19, 2020 at 1:05 PM Hans-Martin Mosner <hmm@heeg.de> wrote:
We're currently working on moving our mail system over to a "mailu" dockerized implementation, so I will gather some experience in connecting Mailman3 with a dockerized postfix.
Yeah, using dockerised postfix is straight-forward in the same docker-compose stack - one just need to mount var/data folder of Mailman core into the Postfix container, set transport_maps, local_recipient_maps and relay_domains parameters to correct values and set Postfix service name into SMTP_HOST environment variable of Core and Web services.
(I'm using my simple Postfix Docker image for this purpose - works pretty well: https://hub.docker.com/r/danilsmirnov/postfix )
But how about that idea to offload Postfix-Mailman communication from a filesystem to a network using Postfix socketmap_tables feature which I like a lot as it allows me to get rid of using any shared volumes in the stack completely - it's quite convenient in multi-host setups like Docker Swarm or Kubernetes...
Best regards, Danil