Configuring mta to allow relaying about docker-mailserver

[jeboehm]

Hi @agittins
add your second server's IP address to mynetworks, like you did before.
After that you have to relay your mail to Port 25.

The submission port is always restricted to real users, requires authentication and checks for allowed sender addresses, this is why you want to use the other port.

If the firewall won't let you out on this port, I'ld recommend to use VPN between those servers, or map an additional port to 25 in your container configuration.

I run this setup for my own since the march update. :)

[agittins]

Ahh, of course. I didn't click that the submission port was more restrictive in that way.

That works perfectly, thanks! I have mapped an additional port on my main server to it's mta's port 25, and pointed my client's server to that new port. The mynetworks setting seems to be doing the trick there and the mail is flowing.

Thanks!

[jeboehm]

Awesome! You're welcome! :)