Intermittent SMTP timeout issues about docker-mailserver

[jeboehm]

Hey @Harti
I'm working on implementing the submission port 587. But to not introduce a breaking change, I need a configuration toggle for activating this. This needs some time.

A working filter service is required for all smtp actions. So I think this has to do with #49. I'm sure that you can send mails when you have solved that issue.

[agittins]

I also ran into this - port 587 is pretty common, especially since a lot of ISPs will block egress on port25 for clients.

I changed my dockerfile override to include:

  mta:
    ports:
      - "0.0.0.0:25:25"
      - "0.0.0.0:587:25"

and it seems to be working OK on both ports, I can't think of a downside but I'd welcome another perspective...

[jeboehm]

Hey agittins
This isn’t a bad solution in any case. I’ld guess that it might be better to do the client smtp communication complete separately from the server communication. For that I’ll try to implement port 587 in a regular way.
I’ll keep you informed.