@sharifHi, Thank you for your response. I have followed the steps to add the third-party Veeam server IP to the trusted network via zimbraMtaMyNetwo...

Issue Description (Short):Unable to connect to port 587 from a third-party server (Veeam server) located at the client and this third party server is ...

I have also same problem Md. Shariful Islam Please Reply in this posttail -f /var/log/carbonio.logDec 31 15:39:51 mail postfix/submission/smtpd[380080...