After the reboot we are facing the following error in /var/log/messages
Apr 20 18:20:28 localhost postfix/error[60742]: 87FA816204A: to=<
[email protected]>, relay=none, delay=38601, delays=38601/0/0/0.03, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to alt2.aspmx.l.google.com[173.194.77.27]:25: Connection refused)
Apr 20 18:20:35 localhost postfix/pickup[60740]: 4B9FB167732: uid=503 from=<nagios>
Apr 20 18:20:35 localhost postfix/cleanup[54820]: 4B9FB167732: message-id=<20170420125035.4B9FB167732@SRVBAN19NAPVM01>
Apr 20 18:20:35 localhost postfix/qmgr[43412]: 4B9FB167732: from=<
[email protected]>, size=769, nrcpt=1 (queue active)
Apr 20 18:20:35 localhost postfix/error[60758]: 4B9FB167732: to=<
[email protected]>, relay=none, delay=0.08, delays=0.07/0/0/0.01, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to sisahpm.com[10.81.113.147]:25: Connection refused)
Apr 20 18:20:44 localhost postfix/smtp[60261]: connect to mpasis.com[192.168.131.65]:25: Connection timed out
Apr 20 18:20:44 localhost postfix/smtp[60261]: connect to sisahpm.com[10.81.113.123]:25: Connection refused
Apr 20 18:20:44 localhost postfix/smtp[60261]: connect to sisahpm.com[10.81.113.147]:25: Connection refused
Apr 20 18:20:55 localhost postfix/smtp[60183]: connect to sisahpm.com[192.168.131.65]:25: Connection timed out
Apr 20 18:20:55 localhost postfix/smtp[60183]: 1AD9C16771E: to=<
[email protected]>, relay=none, delay=90, delays=0.06/0.04/90/0, dsn=4.4.1, status=deferred (connect to sisahpm.com[192.168.131.65]:25: Connection timed out)
Apr 20 18:21:04 localhost postfix/pickup[60740]: 7ACB8167735: uid=503 from=<nagios>
Apr 20 18:21:04 localhost postfix/cleanup[54820]: 7ACB8167735: message-id=<20170420125104.7ACB8167735@SRVBAN19NAPVM01>
Apr 20 18:21:04 localhost postfix/qmgr[43412]: 7ACB8167735: from=<
[email protected]>, size=791, nrcpt=1 (queue active)
Apr 20 18:21:04 localhost postfix/error[60728]: 7ACB8167735: to=<
[email protected]>, relay=none, delay=0.1, delays=0.08/0/0/0.02, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to sisahpm.com[10.81.113.147]:25: Connection refused)
^[[28~Apr 20 18:21:14 localhost postfix/smtp[60261]: connect to sisahpm.com[172.16.144.179]:25: Connection timed out