Issue Repeated Emails from one domain ?

[H.K]

As per title I'm getting repeated emails from eBay for some reason, I'm not talking about duplicate emails, I mean the same messages arriving over and over once an hour or so.

The email is set up x@domainA.com forwarded to z@domainB.com, both are on the same server.

Anyone know what going on here and how to diagnose.

 

[Martin Dias]

You could start over the mail log: /var/www/vhosts/maillog to see if any errors and also how the mail is handled