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Apparently some spammer is sending mass emails and spoofing my "postmaster" email address in their forged email as the sender (i.e., JaneJones <firstname.lastname@example.org>. This of course is resulting in hundred of thousands of delivery failure notices hammering my postmaster inbox. Is there anyway (other than disabling my postmaster account which violates RFCs) it to block these? I'm feeling a bit helpless right now because none of the forged emails are coming from my mail server! I'm also worried about my domain and postmaster account being labeled as a "spam house" when in reality none of these are within my control to stop.
Any advice will be GREATLY appreciated!