QMailFilter is an easy-to-use Microsoft Outlook add-on designed to provide an advanced intelligent protection against spammers, viruses, unsolicited emails and dangerous HTML code (Web-bugs). QMailFilter uses Bayesian filtering technology that identifies about 99% of incoming spam messages and it contains one before-trained filter as basic data base and this trained filter identifies between 90-99% of incoming advertising emails. QMailFilter seamlessly integrates into the MS Outlook workspace, scanning and quarantining away junk emails; caught spam is placed in a special Spam and Virus folder under your inbox. Advertising emails are examined on the basis of words contained in it; depending upon how many from advertising emails and from normal emails well-known words in an email seem, a probability in % is assigned to this email. QMailFilter supplied with before-trained filter (data base). The basic data bank contains characteristics from approx. 10,000 classified advertising emails as well as from 1,000 classified normal emails; altogether this data base contains a Spam dictionary with approximately 80,000 entries. After the installation of QMailFilter, by its further characteristic as adaptable rule-based filter, your personal post inbox is trained, thus the recognition ratio of unsolicited emails is drastically increased. By this training the word speaking and expression style of your received emails is content wise analyzed; with the result that the filter criteria are permanently optimized. For advertising senders it will thereby increasingly more difficulty to adapt its emails in such a way that these are not recognized and segregated by the receiver. QMailFilter enables users to run and manage their friends and enemies lists, build their own filters or set it to block any messages written in unsolicited emails.