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Postmaster Account being flooded with incomming delievry failure notices due to spoofing
Question asked by Wolf Tombe - September 12, 2015 at 9:34 AM
Answered
Apparently some spammer is sending mass emails and spoofing my  "postmaster" email address in their forged email as the sender (i.e., JaneJones <postmaster@mydoman.com>.  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!
 
Wolf

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Bruce Barnes Replied
September 12, 2015 at 10:54 AM
Sounds like you're being "joe jobbed."  see: https://en.wikipedia.org/wiki/Joe_job
 
Setup, and enable, DMARC.
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

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