I get this error in the mail log of the sender:
018-04-04 19:38:37 1f3mMn-0001Hb-EA Sender identification U=quanticosoft D=quanticosoft.com
[email protected]
2018-04-04 19:38:37 1f3mMn-0001Hb-EA SMTP connection outbound 1522863517 1f3mMn-0001Hb-EA quanticosoft.com
email@XXXX.net
2018-04-04 19:38:37 SMTP 57831 closed by QUIT
2018-04-04 19:38:38 1f3mMn-0001Hb-EA [xxxxxxx] SSL verify error: certificate name mismatch: DN=\"/CN=s1.server.net\" H=\"mail.server.net\"
2018-04-04 19:38:38 1f3mMn-0001Hb-EA **
e[email protected] R=dkim_lookuphost T=dkim_remote_smtp H=mail.server.net [xxxxxx] X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no: SMTP error from remote mail server after pipelined DATA: 550 5.7.1 Command rejected
2018-04-04 19:38:38 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1f3mMn-0001Hb-EA
2018-04-04 19:38:38 1f3mMo-0001Hq-GT <= <> R=1f3mMn-0001Hb-EA U=mailnull P=local S=2304 T=\"Mail delivery failed: returning message to sender\" for
[email protected]
2018-04-04 19:38:38 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1f3mMo-0001Hq-GT
2018-04-04 19:38:38 1f3mMn-0001Hb-EA Completed