What is POPFile?
POPFile classifies email into categories you define. It can sort into
spam and not spam or into any number of categories you like (e.g.
work, personal, important project, hobby, etc.).
The classification is done using a naïve Bayes algorithm. In other
words, POPFile uses statistics to track which words are likely to
appear in which messages. This means that POPFile will adapt to the
kind of mail you receive and needs to be trained. Out of the box, it
doesn't know anything about spam or how messages from your mother
differ from those your friends send you. However, if you train it, it
will soon learn how to tell these different kinds of messages apart.
How does POPFile work?
POPFile is a proxy which sits between your mail client and your mail
server. Commands generated by your email client are passed through
POPFile to the email server. As messages are retrieved, POPFile reads
incoming messages, tries to classify them to the categories you have
defined and then passes them on to your email client.