[Mimedefang] Sendmail / MIMEDefang Question

[Jason KRISCH]

It seems that my Sendmail is trying to send NDRs and other messages back to senders who try to send mail to users that do not exist on my system.  How do I stop it from doing this?  It is taking up valuable resources and I don't want to be trying to reply to spammers.  I am using SA / MD in a relay config infront of a non-linux mail server.

Thanks!!!

Jed