us.spamassassin.org -> au.spamassassin.org/index.html
Using its 25 rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email. Note: This is the home page for the main open-source SpamAssassin distribution. Packages downloaded here contain UNIX-oriented front-end scripts. Versions for Windows, commercial versions, and other front-ends, are listed on 26 this site. If you were sent here because you received an e-mail message which was modified by SpamAssassin, please go to 27 this page. The spam-identification tactics used include: * header analysis: spammers use a number of tricks to mask their identities, fool you into thinking they've sent a valid mail, or fool you into thinking you must have subscribed at some stage. Since spam typically operates by sending an identical message to hundreds of people, Razor short-circuits this by allowing the first person to receive a spam to add it to the database -- at which point everyone else will automatically block it. Once identified, the mail can then be optionally tagged as spam for later filtering using the user's own mail user-agent application. It accomplishes filtering without this knowledge, as much as possible. The distribution provides a command line tool to perform filtering, along with Mail::SpamAssassin, a set of perl modules which allow SpamAssassin to be used in 31 wide range of products. SpamAssassin is in the process of becoming an 33 Apache Software Foundation top-level project. We are currently undergoing 35 incubation at the 36 ASF. In the meantime, the project has yet to be fully endorsed by the ASF. Features * Wide-spectrum: SpamAssassin uses a wide variety of local and network tests to identify spam signatures. This makes it harder for spammers to identify one aspect which they can craft their messages to work around. As a result, it's not limited to the traditional local-delivery-to-spool case; This means that SpamAssassin support is available for a variety of mail systems -- traditional procmail, a Mail::Audit plugin, 38 qmail, 39 sendmail, 40 Postfix, 41 many others.
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