Alchemy Spam Filter is a plug-in module for the Outlook Express e-mail program and represents a self-adaptive unsolicited mail protecting tool. The main method used to combat spam is the statistical algorithm of Bayes. Based on self-learning technology, it is more effective than other traditional anti-spam techniques, based on static blacklists checking and keywords databases. Properly learned, this filter can reach a spam detection rate up to 98% with minimum false positives. Alchemy Spam Filter also supports user defined white, black and ignore lists that can be a useful addition to the Bayesian engine correcting its behavior.