I have been running Exim for a while but today an email coming from my server was bounced. The email was send using Gmail which has the SMTP configured and the Delivery Status Notification given by Gmail was "550 No such recipient here". As I am sure the address exists I looked at the logs and found the following.
I also see message like this a lot that worry me.
This is beyond my knowledge and I would appreciate if someone could explain what is going on.
2020-01-22 09:49:01 SSL_write: (from mail-oln040092068028.outbound.protection.outlook.com (EUR02-HE1-obe.outbound.protection.outlook.com) [126.96.36.199]) syscall: Connection reset by peer 2020-01-22 09:51:37 H=mail-io1-f54.google.com [188.8.131.52] X=TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no F=<firstname.lastname@example.org> A=plain:email@example.com rejected RCPT <firstname.lastname@example.org>: 2020-01-22 09:51:37 H=mail-io1-f54.google.com [184.108.40.206] incomplete transaction (QUIT) from <email@example.com>
2020-01-22 23:50:47 H=([220.127.116.11]) [18.104.22.168] incomplete transaction (connection lost) from <firstname.lastname@example.org> 2020-01-22 23:50:47 unexpected disconnection while reading SMTP command from ([22.214.171.124]) [126.96.36.199] (error: Connection reset by peer) D=2s