Under spam attack, want to reject NDR's
Posted on 2008-06-20
I'm under a spam attack at the moment - I've just been flooded with NDR's. I've already installed Service Pack 2, so I've set up connection filtering and intelligent message filtering, but not SenderID or the stricter methods, such as rejecting non-specific e-mail addresses (I need to be able to accept e-mails sent to 'info@' etc.)
The problem is, because these are NDR's, they're getting through: so firstly, is there any way I can configure Exchange to bury the NDR's silently in order to relieve the symptoms, and secondly, what other hardening techniques do you recommend that I apply?