Turn this around and make a rule for it. I have one and it works great. FROM_ME_TO_ME.
The description says, "Why the hell would I get email from myself, from outside!"
Well, I often send myself email, usually to store some (important to me but not sensitive) information so it can be accessed from other locations by IMAP or Webmail. It's nearly always from 'inside', but occasionally my laptop is connected via a customer's or vendor's firewall that blocks connection to my SMTP server by SSL or ASMTP, and also blocks the non-standard port my Webmail is on, but permits access to a local outgoing SMTP relay. Voilà.
Viruses, I handle for them, I am sure they don't want them.
I have had trouble with systems blocking .eml and .url attachments. Unfortunately, when a user (that doesn't know better) clicks the Mail button in IE and selects Send a Link, a message with a .url attachment is created. Likewise, selecting 'Forward as Attachment' in Outlook or OE generates a .eml .
In addition, it is sometimes good to receive a virus. I occasionally recognize a customer's or vendor's IP address as the source, and advise them of the problem. They are generally appreciative, and that is good for business.
The biggest performance benefit you'll see is if you use spamd. The pre-forking of children makes an incredible amount of difference.
Just ask Michael Jackson :)
--Stewart
