I have a Sophos SFOS V21. different internal servers (Ubuntu postfix and MS Exchange). Since a couple of days mails are no more forwarded directly to the internal servers. Stuck in mail queue with "static smtp defer (-53)" or (100). Server timed out DT=15s.
But both servers are permanently available (ping and also port 25).
Sometimes mails are forwarded directly. Sometimes they need 2 retries or more. Sometimes they are simply not forwarded and stuck in queue until they get back to sender.
Both servers are in different VLANs.
I have no idea where to find the solution.
Certificates of the sophos and the mailserver are valid.
Outgoing mail is not affected...
Any hints?
Merry christmas and thanks for help
Gernot
PS: I checked from mailserver side. there is "time out" at Sophos but not logged connection from sophos on mailserver.
Seems that sophos makes no attempt.
logging added
[edited by: GernotMeyer at 1:41 PM (GMT -8) on 24 Dec 2024]
