Receiving invalid NDR bounces?

Receiving invalid NDR bounces?
You’re not the only one.

April 16, 2008 - Postini publishes a Technical Bulletin on the increase in invalid NDR’s.

April 7, 2008 - Spammers have increased their utilization of “spoofing” or “joe-jobbing” (falsifying the from address of an email) in the last few weeks, resulting in some email addresses receiving an increased amount of bounce messages for mail they did not send. Postini is currently capturing the majority of these messages when the bouncing server preserves the original spam content, but if the bouncing server has significantly changed the message then Postini may have allowed this message through as we do do not stop NDR bounces.

Exchange My Mail, Inc offers all of it’s customers Postini Spam and Anti-Virus protection with every mailbox. They do a fantastic job of capturing spam and viruses while letting all the good mail through. Each user has their own login to adjust the filtering settings, as well as add senders or domains to the white or black list.