Bounced emails in MTA?

Hey Crazybeaver 

I would suggest taking a look at your awarrenmta.log on the CLI of your XG to find out more information regarding these bounces.

Here's the KB to help you out.

Regards,

FloSupport | Community Support Engineer

Thank you. Already openend a support case.

Waiting for the output of the logs now after I receive new mails that bounce back.

This is what I can see in the log for one of the bounced e-mails.

ADMIN Mar 23 10:52:21 [0xc00032f8]: SRC: * ,FROM: *, SUBJECT: *, MAIL_ID: *  Accepted by Device

ADMIN Mar 23 10:52:26 [*]: [*] FROM = *, TO = *, SUBJECT = *, recv_time = Mar 23 10:52:21, size = 428657, status = Bounced,reason = SMTP Failure in DATA command.

ADMIN Mar 23 10:52:26 [*]: [*][*] R=MX h=* SSL=0

ADMIN Mar 23 10:52:26 [*]: [*] FROM = , TO = *, SUBJECT = Delivery Failure Notification, recv_time = Mar 23 10:52:26, size = 100778, status = Bounced,reason = Mail has been discarded from device after multiple failed delivery attempts., fwd_time = Mar 23 10:52:26

*=hidden data

Fixed

The Exchange server bounced the emails back to the Sophos, it was in the content filtering of the Exchange server.