cat /var/log/exim_mainlog | grep ***************
2018-03-13 14:27:37 *************** <= service@suck.com H=(suck.com) [255.255.255.255]:46853 P=esmtpsa X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no A=dovecot_login:service@suck.com S=1347 id=8d11f6cafb4e8c607c25a090aac77df8@suck.com T="\345\205\250\346\260\221\345\250\261\344\271\220\357\274\214\344\270\215\345\217\230\351\243\216\345\220\221\343\200\202\346\263\250\345\206\214\351\200\20128\343\200\202 \347\232\204\345\211\257\346\234\254\357\274\232" for Test@gmail.com
2018-03-13 14:27:37 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc ***************
2018-03-13 14:27:37 *************** Sender identification U=sbusco D=suck.com S=service@suck.com
2018-03-13 14:27:37 *************** SMTP connection outbound 1520922457 *************** suck.com Test@gmail.com
2018-03-13 14:27:40 *************** => Test@gmail.com R=dkim_lookuphost T=dkim_remote_smtp H=mx3.qq.com [103.7.30.40] X=TLSv1.2:AES128-SHA256:128 CV=yes C="250 Ok: queued as"
2018-03-13 14:27:40 *************** Completed