Good morning all!
I come to you with an issue on my mails on 1 of my UCS.
I host different UCS servers for different domains. I use an SMTP gateway in DMZ for all the domains and it works just fine.
I added a new server (UCS 4.3.430) a while ago, and noticed errors on the domain installed on this new server. I get timeouts when transfering emails with larger than 100kB.
All my other servers work fine but this one keeps dropping the connection with the SMTP gateway with timeout errors: dsn=4.4.2, status=deferred (conversation with 10.xx.xx.xx[10.xx.xx.xx] timed out while sending message body)
I have checked all the config files for Postfix on the new machine and the old ones, and there exactly the same. The only difference I can see is that the old servers have been build on 4.2 then upgraded, when the latest server has been built straight on 4.3.
Do you guys know where I should look to sort that out?
Thanks for your help!