Get Mailwasher. It's a free download and lets you filter emails out
BEFORE YOU DOWNLOAD FROM YOUR ISP. So your machines won't be tied up
downloading emails you're only going to delete anyway.

I'm getting more than 1000 of the worm notes a day and not one gets as
far as my computer. Standard disclaimer - not connected with it in any
way except as satisfied user.

http://www.mailwasher.net/

Here's the welcome/pitch letter from the guy who wrote the program:
-------------------------
Finally the easy solution to managing your incoming emails has
arrived. And it's free!

Introducing MailWasher, the easiest way to check and manage your
e-mails before you download them.

MailWasher is a powerful email checker with effective spam
elimination. Discover the safe way to stop unwanted viruses and
e-mails before they get to your computer.

No gimmicks here, it is so easy to set up and use that you'll be
managing your email like a pro in seconds. It can even be used as an
effective privacy tool.

I think you will find this to be the easiest, most effective way to
manage your incoming e-mails. You will be amazed at how quickly you
will like using MailWasher.

Best regards

Nick Bolton - MailWasher.net
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Pastorio