Mail relay port 25

[jobbedf]

I have some questions.

So I just set up a Proxmox mail gateway and everything works, I can send mail and receive mail but everything happens over port 25.
But if I'm not mistaken, port 25 is for non-SSL SMTP, right?
Are mails then not received or sent over SSL or is that just for connections like with Outlook clients?

 

[aaron]

If ssl is used or not does not depend on the port.

Have a look at: https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#chapter_deployment

Incoming emails from external mailservers, are expected to be received on port 25. Outgoing emails, from your mail server, are expected on port 26. This will most likely need a config change in your mail server.

Clients such as Outlook, should connect to your actual mailserver, not the PMG directly.