Tag Archives: NDR

Exchange 2007 or 2010 stopping NDR from postmaster@ filling queues from backscatter spam
20/04/2010

If you find your queues are getting full of NDRs from the postmaster to spammers... read more

Receiving domain.local #5.7.1 smtp;550 5.7.1 RESOLVER.RST.AuthRequired; authentication required
09/03/2009

When sending to an exchange 2007 recipient or distribution list you may receive the following... read more