Next-gen BitDefender solution adds heuristic spam filters

Written by Roxana Danaila

Continued from page 1

Additionally, new filters have been included, such asrepparttar Image filter, which is able to recognize and tag images frequently used in spam e-mail,repparttar 105890 URL filter which blocks mail containing "sneaky" links, andrepparttar 105891 Charset filter, which will block any e-mail written in "strange" characters.

Various bells and whistles, such as configuration wizards, better ways to manage your friends list, and a handy fix that will disable incoming mail notifications for spam e-mail, so that Outlook will only signal when legitimate e-mail arrives, completerepparttar 105892 package.

The product is available for evaluation and purchasing as of today, and is priced at USD 19.95 for a single user license. BitDefender AntiSpam 7.2 users can, obviously, upgrade to BitDefender 8 SpamDeny free of charge.

BitDefender™ provides security solutions to satisfy the protection requirements of today's computing environment, delivering effective threat management for over 38 million home and corporate users in more than 100 countries. BitDefender(tm) Antivirus is certified by all the major independent reviewers in the antivirus field - ICSA Labs, CheckMark and Virus Bulletin. Website:

So What Makes a Good Spam Filter Anyway?

Written by Alan Hearnshaw

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Of course, by definition, community filters cannot reach 100% accuracy as someone has to be gettingrepparttar spam to be voting it as such! Theoretically, a Bayesian filter may be able to eventually get quite close to 100% accuracy, so at least there is hope there. Content based filters (those that look for certain words, phrases or other indicators in a message to identify it as spam), will almost certainly not get much higher accuracy figures thanrepparttar 105889 best of them can achieve today. Adapting to changing spam requires new filters to be created on an ongoing basis.

And finally, we come torepparttar 105890 holy grail of spam filtering:

It is transparent Strangely enough, not enough work seems to be done in trying to achieve this goal. Some ofrepparttar 105891 best filters onrepparttar 105892 market today identify spam with impressive accuracy and then simply place them in a “killed mail” folder for your later perusal. Now, forgive me if I’m missing something here, but isn’trepparttar 105893 point to save you having to wade throughrepparttar 105894 junk mail? Isn’t that what you boughtrepparttar 105895 filter for? Withrepparttar 105896 “SpamSplatter 3000”, you don’t need to do that.

As we haven’t achieved 100% accuracy yet (and probably never will),repparttar 105897 only way to free us from checkingrepparttar 105898 killed mail folder is a challenge/response system. This is where a message is automatically sent back torepparttar 105899 sender requiring them to take some action for their message to actually be delivered.

Some systems tend to go overboard withrepparttar 105900 challenge/response system. These systems - often called “Whitelist” systems - block messages from anyone that isn’t inrepparttar 105901 user’s friends list. Guaranteed 100% effective, but too drastic a measure for most users.

Now, it seems thatrepparttar 105902 most intelligent use of this system would be to send challenges only to messages that were flagged as “questionable”. Good message can be delivered, definite spam can be deleted and questionable ones would earn themselves a challenge message.

So, to sum up, let’s rewriterepparttar 105903 qualities of our perfect filter and get a shopping list of what to look for while we wait forrepparttar 105904 “SpamSplatter 3000” to arrive:

1. Simple, minimal setup and maintenance. 2. Extremely low rate of false positives and as few false negatives as possible. 3. A transparent “fail-safe” mechanism wherebyrepparttar 105905 victims of those false positives can forcerepparttar 105906 message through to you.

It’s simple really. Now, who’s going to build me this “SpamSplatter 3000”…?

Alan Hearnshaw isrepparttar 105907 owner of, a site which provides weekly in-depth spam filter reviews, user help and guidance and a community forum.

Alan Hearnshaw is a computer programmer and the owner of, a site which provides weekly in-depth spam filter reviews, user help and guidance and a community forum.

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