PostArmor is an application that helps to keep your electronic mailbox
free of unsolicited e-mail, better known as spam: it looks at the
relevant parts of your email before it leaves the mail server, and lets
the legitimate messages pass through undisturbed, while leaving suspect
messages on the server, making them "invisible" for the e-mail client,
to be reexamined later or just deleted after a while. It works as a POP
email proxy, with support for POP and IMAP mail servers, that makes it
compatible with every e-mail client. As it has been developed in Java,
it is also independent from the operating system or platform, and gives
its best on Mac OS X.
The logic behind the filtering has a high level of
sophistication, using both black- and white-lists of senders and an
advanced engine that can use pattern matching and sender verification
techniques to automatically pinpoint junk mail with a extremely high
level of accuracy. A proved set of filters is included, and can easily
be adapted by the user to its individual interests.