Found an ineresting read on this HERE
The four most common causes:
1. Spammers send out blank test emails
2. There was something in the mail that your ISP's virus filter or your personal virus software didn't like (Snappers fix)
3. The mail is written in a format your computer is not set-up to handle.
4. There is something in the message, but the sender set the size of the font so small
Edited by boopme, 09 April 2006 - 11:13 PM.