Free bayesian spam software for windows

The SpamBayes project is working on developing a Bayesian anti-spam filter, initially based on the work of Paul Graham. The major difference between this and other, similar projects is the emphasis on testing newer approaches to scoring messages. While most anti-spam projects are still working with the original graham algorithm, we found that a number of alternate methods yielded a more useful response.
SpamBayes is not a single application.
The core code is a message classifier, however there are several applications available as part of the SpamBayes project which use the classifier in specific contexts. For the most part, the current crop of applications all operate on the client side of things, however, a number of people have experimented with using SpamBayes on mail servers to classify incoming mail for multiple users. The table below outlines the main applications which are part of the SpamBayes distribution.
SpamBayes will attempt to classify incoming email messages as spam, ham (good, non-spam email) or unsure. This means you can have spam or unsure messages automatically filed away in a different mail folder, where it wont interrupt your email reading. First SpamBayes must be trained by each user to identify spam and ham. Essentially, you show SpamBayes a pile of email that you like (ham) and a pile you dont like (spam). SpamBayes will then analyze the piles for clues as to what makes the spam and ham different. For example: differences in the mail headers, different words and content style. The system then uses these clues to examine new messages.
For instance, the word "Nigeria" appears often in spam, so you could use a spam filter which identifies anything with that word in it as spam. But what if your business involves writing a guidebook on Nigerian Wildlife Conservation? Clearly a more flexible approach is necessary. Additionally spammers will adapt their content over time and will no longer use the word "Nigeria" (or the words "Lose Weight Fast", or any number of other common lines). Ideally the software will be able to adapt as the spam changes.
So, that is what SpamBayes does. It compares the spam and the ham and calculates probabilities. For instance, for me, the word "weight" almost never occurs in legitimate email, but it occurs all the time in lose weight fast spam. SpamBayes can then look at incoming email, extract the most significant clues and combine the probabilities to produce an overall rating of "spamminess". It flags the messages so that your mailer can handle the different message types. You might set it up so that ham goes straight through untouched, spam goes to a folder that you ignore (or delete without checking) and the unsure messages go to another folder which you can review for errors.
This version does not work with Outlook Express, but there is a version that does. For more information click here

Generic drugs. Replica watches. Low-interest loans. Porn. Nigerian bank fraud. Paypal and eBay account updates that demand your passwords. Research indicates that 90 percent of all email is spam.

Don't just accept this as an unfortunate fact of life. Spam is dangerous. Spam wastes your time. Spam invades your life and your privacy. Spam infects your computer with Spyware and Trojans that steal your identity.

Unleash the power of trainable, heuristics-based anti-spam tools of Agnitum Spam Terrier that plug into Outlook Express and Microsoft Outlook.

• Extensive Mail Control
• Personalized filter training
• • Spam Terriers Bayesian filter, the core of the program, can be trained to recognize new spam when it arrives. Because spam is different for different people, you get to define what should be considered spam by telling Spam Terrier what, from your past email, you consider to be spam. The filter then learns certain behavior/appearance patterns and applies these characteristics to spam filtering of future messages.
  • The Bayesian filter is based on probability algorithms that assess the odds of new messages having the same characteristics as past emails designated as spam. The more thoroughly you train Spam Terrier, the more accurate and tailored to your requirements the results will be.
• Adjustable sensitivity thresholds
• • Each incoming message is assigned a "spam score" by Spam Terrier, which classifies the message as not spam/probable spam/definite spam. You can change the way these calculations are made by modifying the values the scores fall into to suit your level of tolerance.
• Definable whitelists and blacklists
• • Spam Terrier doesnt limit its filters to the use of senders white- or blacklists (respectively, the list of allowed/blocked senders) when it processes emails. Users can also create special filters based on a number of variables: for example, message body text, header content, or email subject. Email addresses in users address books are automatically added to the list of legitimate senders.
• No lost messages
• • Suspected spam messages are put into a special folder that you can check at your convenience and restore any misclassified messages. You can also expand the Spam Terrier Bayesian database by clicking "mark as not spam" on any valid message in the Spam folder.
• View message status
• • By clicking on any message in any folder, users can see how likely that message will be flagged as spam by reviewing its cumulative spam score. Users also thus get valuable insight into how the ranking works in practice.
• Continuity of Protection
• Automated spam check
• • Spam Terriers real-time self-learning algorithm ensures every incoming message is automatically analyzed against the programs indicators to determine the legitimacy of the message. Suspicious emails are then quarantined for later review.
  • As Spam Terrier constantly scans new mail in search of fresh spam samples on which to base its junk mail database updates, the accuracy rate increases over time and minimizes the number of false positives while maximizing the spam identification rate.
• On-demand scan
• • Spam Terrier can check existing email folders for the presence of spam. This on-demand spam scan removes junk emails in advance from any specified folders, and ensures that mailboxes start out as clean as possible.
• Ease of use:
• Intuitive installation
• • The process of installation is so easy that even a beginner will have no problem getting started with Spam Terrier.
• Seamless integration with email clients
• • Spam Terrier is integrated directly into Outlook and Outlook Express, adding a small toolbar to the menu bar. Controls are intuitive and no special knowledge is required.
• Support for multiple email accounts
• • Spam Terrier supports multiple email accounts when it checks spam. It maintains two separate databases for Outlook and Outlook Express Bayesian algorithms.
• Multiple-language interface
• • Spam Terrier is available in English, German, Spanish, French, and Russian.

Major Features:

1. Save time and inbox space by having Agnitum Spam Terrier automatically filter out unwanted correspondence.
2. Defend against malicious and fraudulent messages.
3. Never miss a valid message from a friend by having Spam Terrier define white and black lists, along with your personalized settings.
4. Enjoy the highest accuracy of message processing by training Bayesian filter and adjusting sensitivity thresholds.
5. Never get lost. Spam Terrier delivers a user interface that is easily manageable, with convenient, intuitive controls attached to the main client application.
   

Requirements:

• Hardware: 128 Mb RAM, 300 MHz or higher x86-compatible CPU (AMD, Intel chip), 100 Mb free disk space.
• Supported Email Clients: Microsoft Outlook 2000, 2002, 2003, 2007. Microsoft Outlook Express 5.0, 5.5, and 6.0, The Bat.
• Supported protocols & software: POP3, SSL POP3, IMAP, HTTP (MSN, Yahoo, AOL), Exchange

a-squared Anti-Spam is a desktop anti spam solution designed for personal users who are not able to use server side spam filtering or dont trust the spam filter of their internet service provider.
a-squared Anti-Spam was designed for Outlook Express 6 and MS Outlook XP/2003, but any other e-mail clients can be used too.