2017-04-22 21:09:18 1d1viw-0000dF-5h <= test@bantrasofa.com H=(61.14.232.40) [127.0.0.1] P=esmtpa A=login:test@bantrasofa.com S=580 id=0c69e41344c7a545c7422720467cbbf4@bantrasofa.com T="tong6462@gmail.com" from <test@bantrasofa.com> for tong6462@gmail.com
2017-04-22 21:09:18 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1d1viw-0000dF-5h
2017-04-22 21:09:20 1d1viw-0000dF-5h ** tong6462@gmail.com F=<test@bantrasofa.com> R=lookuphost T=remote_smtp H=gmail-smtp-in.l.google.com [74.125.204.26] X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=yes: SMTP error from remote mail server after end of data: 550-5.7.1 [61.14.232.40] The IP address sending this message does not have a PTR\n550-5.7.1 record setup. As a policy, Gmail does not accept messages from IPs\n550-5.7.1 with missing PTR records. Please visit\n550-5.7.1  https://support.google.com/mail/answer/81126#authentication for more\n550 5.7.1 information. u6si3554756pld.336 - gsmtp
2017-04-22 21:09:20 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1d1viw-0000dF-5h
2017-04-22 21:09:20 1d1viy-0000dP-Ce <= <> R=1d1viw-0000dF-5h U=mail P=local S=2628 T="Mail delivery failed: returning message to sender" from <> for test@bantrasofa.com