UseBestMail anti spam with Whitelist and challenge-response but without the need to filter
You can have a spam-free channel for your email right now, here, today. 
Anti spam techniques that are unique to UseBestMail
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UseBestMail works with all Windows email Programs including: Outlook, Outlook Express, Netscape, Eudora, Thunderbird and Pegasus.  Setup is quick and easy.  Works with multiple accounts.
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(c) Martel Firing dba Signal Trading LLC, 2004.  UseBestMail and FriendMark are trademarks of Signal Trading LLC
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Spam Blocker, Filter, challenge response, junk mail stopper
Updated: 8/27/05
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Hello,
  I'm Martel Firing the author of UseBestMail.
My software is the first and only product that stops spam 100% and prevents it from being sent in the first place.  Using the exclusive Spam-Free Channel your email is certified when sent and validated when received.  So you, your friends and associates know the mail is valid.  But spammers can't use it.
This software also uses proven whitelist, challenge response and preview technology to give you complete spam protection from the first day you use it.

Blocks Spam 100% and Lets the Good Mail through. Unlike a filter, you won't lose any good mail and the spam is all blocked.  UseBestMail is fast, unambiguous and does not censor your mail.

UseBestMail's Whitelist system lets you receive mail from friends.  The Challenge/Response system lets you receive mail from friendly strangers, automatically maintains your whitelist and removes spam.  The Preview feature lets you keep all spam on the server while conveniently snagging automated mailings, such as those from merchants.  It is all incredibly easy and transparent.
Mail from friends is never lost.  Unlike blacklist and community systems, which often mistakenly block good mail, UseBestMail's methods are positive and under your control.
The Spam-Free Channel provides the equivalent of a gated community that spammers can't get into.  It won't accept bulk mail, but you can send your own email free of charge and without hassle.  Nobody else offers this capability.  Try it out now!
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Keep Spyware & Virus email out of your computer. Delete it directly from the server.
You are invited to try UseBestMail FREE for 30-days. If you're not completely satisfied, email me your thoughts and/or suggestions.  Of course, if you're delighted, email me that too!
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Keep your existing email address - UseBestMail works for all POP/SMTP email systems, but not web mail, i.e., (rocketmail, gmail, aol etc.)