email integration - Deferred: Connection timed out with mail.example.com (With Sendmail) -


i have configured sendmail on ubuntu server. mail going other emails , domains perfectly. 1 domain getting following error, please suggest:

nov 8 09:24:24 abcweb02 sm-mta[471]: ua894lay000402: to=, ctladdr= (33/33), delay=00:19:25, xdelay=00:09:06, mailer=esmtp, pri=210473, relay=mail.example.com. [44.44.444.44], dsn=4.0.0, stat=deferred: connection timed out mail.example.com.

the issue resolved following

check telnet connection on 25 port (telnet not getting connected firewall rules modified 25 port)

i using wrong smtp credentials.


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