challenge to known contacts; - Importing e-mail address book in the whitelist - E-mail address from outgoing mail added to the whitelist 2. No challenge sent to spammers. 3. A challenge is clear and easy; - Challenge message with self-explaining picture. - Challenge message in 2 languages (e.g. English and Dutch) - Confirming a challenge with a different e-mail address. Both addresses will be added to the whitelist. 4. Response to mails not sent

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Multiple awards winner mail server with ultimate features, complete security and guaranteed stability. Provides a wide range of optional components and services including secured mail services, user-friendly Web-Mail, Anti-Spam with updates (SpamAssassin,SPF,SURBL,ChallengeResponse,DomainKeys,Greylisting), Anti-Virus, Instant Messaging (based on the Jabber XMPP protocol), GroupWare, FTP, ODBC and load balancing, monitoring and report facilities.

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challenge-response based system, Zaep AntiSpam verifies the sender`s email address before you get the message. This simple procedure is only done once and takes only a few seconds to perform so it doesn`t create an inconvenience. Use Zaep Standard to protect each of the email addresses you use at home from receiving hundreds of advertisements for useless products. Or you can deploy Zaep Professional on your corporate network to have it protect every

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VanMail is a powerful POP3/SMTP email client that allows you to manage your email with ease. With VanMail`s powerful built-in SPAM protection, you control the emails you want to receive. VanMail comes with a powerful rules based system where you can create rules to block emails, whitelist rules (i.e. never block), auto-response rules, alert rules, etc. VanMail even comes with an advanced challenge-response system.

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challenge message when emailing you in the future*. * Listserver/Automated email aware. When correctly tagged by the sender, listserver and bulk emails are not challenged but rather flagged and eventually deleted if not wanted. * One button installation for Outlook and Outlook Express users. * Tracking of statistics and access to consolidated statistics from all AntiSpam users. * All processing is done on your local computer. Information about emails

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Spamologist is a spam filtering program unlike any other. It utilizes several fully customizable defense mechanisms; dictionary filtering, advanced dictionary filtering, advanced header filtering, allow and block lists, online block lists and a state-of-the-art verification system. Spamologist is the only program of its kind that guarantees a reduction in spam of 100%, or your money back.

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