Details
Description
Emails addressed to a department, that are from the same department email address should be silently discarded.
The Issue
A spammer sends an email to support@domain.com, and spoofs the from address as support@domain.com. The system opens a ticket and sends a reply back to support@domain.com. This creates a loop.
While we have loop detection in place, it's not very effective when checking mail via POP or IMAP, and even with it, a number of tickets are created before it kicks in.
I can't think of any legitimate reason a support department should receive an email, with the support departments address as the sender. So, we should simply silently discard any such messages.