We are using iredmail server V0.9.6. One of our email domain is "pnrao.com" which is getting duplicate mails ( two times mail ) from all the email domains.

Log entries:

Jan 18 10:05:31 mail postfix/qmgr[1866]: A7641A698F: from=<yogesh@fcoos.net>, size=5052, nrcpt=1 (queue active)
Jan 18 10:05:31 mail postfix/cleanup[28592]: A839DA708D: message-id=<083c1076-5f5c-5530-318b-fc622f639c01@fcoos.net>
Jan 18 10:05:31 mail postfix/qmgr[1866]: A839DA708D: from=<yogesh@fcoos.net>, size=4093, nrcpt=1 (queue active)
Jan 18 10:05:31 mail postfix/smtpd[27606]: disconnect from mail-ed1-f69.google.com[209.85.208.69]
Jan 18 10:05:31 mail postfix/smtpd[29134]: disconnect from mail-ed1-f69.google.com[209.85.208.69]
Jan 18 10:05:32 mail postfix/10025/smtpd[28945]: connect from mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail postfix/10025/smtpd[28904]: connect from mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail postfix/10025/smtpd[28945]: 23FFAA7095: client=mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail postfix/10025/smtpd[28904]: 2487AA70E7: client=mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail postfix/cleanup[27816]: 2487AA70E7: message-id=<083c1076-5f5c-5530-318b-fc622f639c01@fcoos.net>
Jan 18 10:05:32 mail postfix/10025/smtpd[28904]: disconnect from mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail postfix/qmgr[1866]: 2487AA70E7: from=<yogesh@fcoos.net>, size=4529, nrcpt=1 (queue active)
Jan 18 10:05:32 mail postfix/cleanup[27607]: 23FFAA7095: message-id=<083c1076-5f5c-5530-318b-fc622f639c01@fcoos.net>
Jan 18 10:05:32 mail postfix/qmgr[1866]: 23FFAA7095: from=<yogesh@fcoos.net>, size=5488, nrcpt=1 (queue active)
Jan 18 10:05:32 mail postfix/10025/smtpd[28945]: disconnect from mail.fcoos.in[127.0.0.1]
Jan 18 10:05:32 mail amavis[28953]: (28953-01) Passed CLEAN {RelayedInbound}, [209.85.208.69]:57023 [122.166.3.167] <yogesh@fcoos.net> -> <test@pnrao.com>, Queue-ID: A839DA708D, Message-ID: , mail_id: 76KFBQinGSJb, Hits: 0.972, size: 4090, queued_as: 2487AA70E7, 454 ms, Tests: [RCVD_IN_DNSWL_NONE=-0.0001,SPF_SOFTFAIL=0.972]
Jan 18 10:05:32 mail amavis[27943]: (27943-05) Passed CLEAN {RelayedInbound}, [209.85.208.69]:41472 [122.166.3.167] <yogesh@fcoos.net> -> <test@pnrao.com>, Queue-ID: A7641A698F, Message-ID: , mail_id: 9hScNrQDec0P, Hits: 0.972, size: 5048, queued_as: 23FFAA7095, 456 ms, Tests: [RCVD_IN_DNSWL_NONE=-0.0001,SPF_SOFTFAIL=0.972]
Jan 18 10:05:32 mail postfix/smtp-amavis/smtp[28595]: A7641A698F: to=<test@pnrao.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.65, delays=0.18/0/0/0.47, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 23FFAA7095)
Jan 18 10:05:32 mail postfix/qmgr[1866]: A7641A698F: removed
Jan 18 10:05:32 mail postfix/smtp-amavis/smtp[28003]: A839DA708D: to=<test@pnrao.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.57, delays=0.1/0/0.01/0.46, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 2487AA70E7)
Jan 18 10:05:32 mail postfix/qmgr[1866]: A839DA708D: removed
Jan 18 10:05:32 mail postfix/pipe[28906]: 2487AA70E7: to=<test@pnrao.com>, relay=dovecot, delay=0.14, delays=0.01/0/0/0.13, dsn=2.0.0, status=sent (delivered via dovecot service)
Jan 18 10:05:32 mail postfix/qmgr[1866]: 2487AA70E7: removed
Jan 18 10:05:32 mail postfix/pipe[28948]: 23FFAA7095: to=<test@pnrao.com>, relay=dovecot, delay=0.16, delays=0.01/0/0/0.15, dsn=2.0.0, status=sent (delivered via dovecot service)
Jan 18 10:05:32 mail postfix/qmgr[1866]: 23FFAA7095: removed
Jan 18 10:05:35 mail postfix/postscreen[27603]: CONNECT from [38.89.254.81]:55102 to [10.11.12.251]:25
Jan 18 10:05:35 mail postfix/postscreen[27603]: PASS OLD [38.89.254.81]:55102
Jan 18 10:05:35 mail postfix/smtpd[27606]: connect from mx112.antispamcloud.com[38.89.254.81]
Jan 18 10:05:36 mail postfix/smtpd[27606]: Anonymous TLS connection established from mx112.antispamcloud.com[38.89.254.81]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Jan 18 10:05:36 mail postfix/smtpd[27606]: 6A27FA698F: client=mx112.antispamcloud.com[38.89.254.81]