[root@server1 ~]# sudo /usr/sbin/exigrep 1dMDyB-0006qE-Ux /var/log/exim_mainlog
2017-06-17 09:40:56 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1dMDyB-0006qE-Ux

2017-06-17 09:41:00 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1dMDyB-0006qE-Ux

2017-06-17 09:40:56 1dMDyB-0006qE-Ux <= no-replay@earnstations.com H=(198.54.124.216) [::1]:40788 P=esmtpa A=dovecot_login:no-replay@earnstations.com S=1103 id=dffb59eff05c4fbef7ecc986fccde6b4@earnstations.com T="Would you please check if you got any bounce-back? I still can't see\n your email." for nctest@namecheap.com
2017-06-17 09:40:56 1dMDyB-0006qE-Ux SMTP connection outbound 1497706856 1dMDyB-0006qE-Ux earnstations.com nctest@namecheap.com
2017-06-17 09:40:56 1dMDyB-0006qE-Ux [162.255.118.62] SSL verify error: certificate name mismatch: DN="/OU=Domain Control Validated/OU=PositiveSSL Multi-Domain/CN=se.privateemail.com" H="smx.registrar-servers.com"
2017-06-17 09:41:00 1dMDyB-0006qE-Ux ** nctest@namecheap.com R=dkim_lookuphost T=dkim_remote_smtp H=smx.registrar-servers.com [162.255.118.62] X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no: SMTP error from remote mail server after end of data: 550 High probability of spam
2017-06-17 09:41:00 1dMDyB-0006qE-Ux Completed

2017-06-17 09:41:00 1dMDyG-0006rC-2A <= <> R=1dMDyB-0006qE-Ux U=mailnull P=local S=2586 T="Mail delivery failed: returning message to sender" for no-replay@earnstations.com
2017-06-17 09:41:00 1dMDyG-0006rC-2A => no-replay <no-replay@earnstations.com> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <no-replay@earnstations.com> d7+HGWwxRVkFZwAAR76aTQ Saved"
2017-06-17 09:41:00 1dMDyG-0006rC-2A Completed