ZhangHuangbin wrote:You should post related mail log.
Please see below mail logs for detail
Jul 19 01:12:26 mail postfix/smtpd[85008]: disconnect from mail.zarca-inc.com[127.0.0.1]
Jul 19 01:12:26 mail postfix/qmgr[71047]: 02C96A1021: from=<aamralkar@zarca-inc.com>, size=760, nrcpt=1 (queue active)
Jul 19 01:12:26 mail postfix/smtpd[85039]: connect from mail.zarca-inc.com[127.0.0.1]
Jul 19 01:12:26 mail postfix/smtpd[85039]: DFE4BA1024: client=mail.zarca-inc.com[127.0.0.1]
Jul 19 01:12:26 mail postfix/cleanup[85033]: DFE4BA1024: message-id=<e25ba1df9ce10deda423e988d78ac6b9.squirrel@mail.zarca-inc.com>
Jul 19 01:12:26 mail postfix/smtpd[85039]: disconnect from mail.zarca-inc.com[127.0.0.1]
Jul 19 01:12:26 mail postfix/qmgr[71047]: DFE4BA1024: from=<aamralkar@zarca-inc.com>, size=1803, nrcpt=1 (queue active)
Jul 19 01:12:27 mail amavis[84289]: (84289-06) Passed CLEAN, MYNETS LOCAL [127.0.0.1] [203.212.24.126] <aamralkar@zarca-inc.com> -> <aamralkar@zarca.com>, Message-ID: <e25ba1df9ce10deda423e988d78ac6b9.squirrel@mail.zarca-inc.com>, mail_id: tJ3idIT095rw, Hits: -10.01, size: 760, queued_as: DFE4BA1024, 908 ms
Jul 19 01:12:27 mail postfix/smtp[85034]: 02C96A1021: to=<aamralkar@zarca.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=1.1, delays=0.16/0.02/0.02/0.95, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as DFE4BA1024)
Jul 19 01:12:27 mail postfix/qmgr[71047]: 02C96A1021: removed
Jul 19 01:12:57 mail postfix/smtp[85040]: connect to corp.zarca.com[216.109.67.236]:25: Operation timed out
Jul 19 01:13:28 mail postfix/smtp[85040]: connect to mail.zarca.com[216.109.67.230]:25: Operation timed out
Jul 19 01:13:28 mail postfix/smtp[85040]: DFE4BA1024: to=<aamralkar@zarca.com>, relay=none, delay=61, delays=0.05/0.22/61/0, dsn=4.4.1, status=deferred (connect to mail.zarca.com[216.109.67.230]:25: Operation timed out)