[quote user="Peter Strömblad"]
Some probe mailers only send headers, or when communication is interrupted you can end up with an e-mail without a body content. Many client software have BIG trouble getting these e-mails over POP3. If you add a global filtering rule to RULES.MER with the following line:
If not expression body matches "*" Delete ""
These e-mails are dumped before getting into the user-mailbox.
I've gotten the same thing happen when my virus scanner kills part of the message.