Dnia 18.08.2022 o godz. 09:17:39 Sam R pisze: > As you suggest, I enabled TLS wrappermode on both senders servers and the > internal server, set "smtp_tls_security_level = encrypt " to senders > servers and it seems perfect now. > Thanks a lot Noel and Thank you all too!
I doubt if you should use port 465 at all. RFCs clearly say that port 465 is for mail submission, not for receiving mail addressed to local users, and that authentication is mandatory on port 465. From what you write, it seems that you send mail via port 465 without authentication, which is not the intended use of that port. IMHO, you should be sending mail between your servers using just regular port 25. The servers should have each other IP addresses in $mynetworks, so the receiving server will trust the sending server. Or if you maybe don't want to use port 25 for some reason, just use a completely made-up port instead of 465, that will accept mail only from your sending server. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub."
