Spam eMail Tactics Changing

Troy, Michigan -- Senior support technicians at Computer Mail Services, Inc. (CMS) have recently been following a rise in a certain type of spam email attack called Reverse NDR (RNDR). The rise in RNDR email volume appears to coincide with spammers changing the methods and format of their search for valid email addresses.

Historically, email addresses used in the RNDR form of spam email have been harvested from the Internet or other sources and represented possibly valid recipients. spammers then target these harvested addresses by using non-delivery notices generated by mail systems as a backdoor to placing their messages in recipient inboxes. While the volumes of spam email sent to a particular site was large, they were in a certain, almost legitimate format.

Recently, CMS and their customers noticed larger than usual volumes of filtered RNDR mail containing randomly generated character strings as an address. Coinciding with the appearance random addressing is a massive increase...

» dBusinessNews - Lih-Tah Wong - 14-08-2006