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Ratings, Reviews & Comparisons of Email Spam Filters. Spam filters assist in blocking junk, spam, pornographic and annoying emails. To limit porn, nudity, viruses, hackers, worms, trojans, porn, and violence set up a spam filter.

Spam Filter Software

Which Anti-spam Software is Best for You?

Benefits of The Top Rated Spam Filters

MailWasher Pro

You can add as many email accounts as you want to check. POP3, Hotmail, AOL and IMAP are supported by MailWasher® Pro.
MailWasher® Pro works with your existing email program, whether it is Microsoft Outlook, Eudora, Netscape or any other program.
MailWasher® Pro is the answer to your time wasting junk mail problems, as well as letting you preview and delete your email before it gets to your computer, MailWasher® Pro also enables you to subscribe to the FirstAlert!™ spam database. Join the community of FirstAlert! subscribers reporting spam messages and watch as even more spam disappears from not only your inbox, but the inboxes of all other FirstAlert! subscribers as well!
MailWasher® Pro learns and adapts to your personal preferences by letting you teach it the kind of email you want to receive. These intelligent filters use Firetrust's advanced learning filters (Bayesian statistics) to deliver a robust and efficient approach to solving your spam problem!

Cloudmark SafetyBar

Cloudmark SafetyBar takes the successful spam-fighting features of SpamNet and adds significant antifraud capabilities.
Cloudmark Rating system helps legitimate e-commerce sites connect with their members. As long as you use Outlook or Outlook Express, SafetyBar will protect you against both spam and phishing fraud.
Cloudmark SafetyBar, stands alone as the world’s most award-winning anti-spam desktop solution, by scoring the highest accuracy rate in PC Magazine’s last four reviews, while registering consecutive zero false positives in the magazine’s last two reviews.
SafetyBar remains undefeated as the best spam protection having consistently garnered top accuracy to win PC World 2004 World Class Award for Best Spam Filter and PC Magazine’s Editor’s Choice among many other industry awards.

Qurb Spam Filter

Block Spam from your inbox with Qurb

PC Magazine Editors' Choice 2003 and 2004
PC Magazine Best of 2003

"Qurb couldn't be more elegant or simpler to use. It adds a mere three buttons and a folder to your Microsoft Outlook client, and it uses nothing but a whitelist to filter incoming messages."
Cade Metz and Larry Seltzer

"Qurb is the only spam fighter we've seen that stops 100 percent of junk e-mail straight out of the box. Impressive? You bet."
CNET product review, March 25, 2003

QURB STOPS SPAM PERIOD.

From the moment you finish installing Qurb, 100% of spam will be blocked from your Outlook or Outlook Express inbox.

Choicemail One Pop3 Anti-Spam Protection

ChoiceMail works with Microsoft Outlook, Eudora, Mozilla, Netscape, Outlook Express. You can also setup ChoiceMail to filter your Web based email clients such as AOL, Hotmail, and Yahoo as long as you read them from your POP3 client.
ChoiceMail One Detects and deletes spoofed messages that appear to come from your own email address - a favorite spammer trick. ChoiceMail One has received much critcal acclaim for its ability to stop 100% of spam.
Overall ChoiceMail works great at filtering your unwanted spam, it does however work separately from your email client and you have two step process between ChoiceMail and your client.

Definitions

Bayesian Filter - Bayesian spam filters calculate the probability of a message being spam based on its contents. Unlike simple content-based filters, Bayesian spam filtering learns from spam and from good mail, resulting in a very robust, adapting and efficient anti-spam approach that, best of all, returns hardly any false positives.

Challenge Response - Good mail comes from the senders you know -- your friends, your family, the publisher of an email newsletter you have subscribed to. For all other mail, it's safe to assume that it is spam.

Accordingly, challenge/response filters do not try to filter out the spam but look for mail from trusted senders (senders on your so-called "white list") and let it through. Everything else is thought to be spam and quarantined. This makes for a fantastic spam detection rate.

But what about the occasional message from somebody not yet on your white list who is not a spammer? What about the mail from an old friend, from a newsletter you have just signed up for, what about if somebody changes their email address?

The Challenge

Challenge/response filters take care of these situations automatically, too.

Every new sender is mailed a challenge. If they respond to the challenge, the sender is automatically put on your white list, the original message is recovered and you can communicate with the now trusted sender unhampered.

Usually, the challenge consists in solving a captcha. Captchas are tasks that are trivial for humans but highly complex and expensive to solve for computers.

Since spammers deliver their emails to millions of email addresses, they can't solve all the captchas "by hand", but they can't have computers answer them either. Senders of legit mail can respond to the challenge easily, however. Thus, their mail gets through while the spam is trashed.

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