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          MODULE=spamassassin
           RNAME=Mail-SpamAssassin
         VERSION=3.3.2
          SOURCE=$RNAME-$VERSION.tar.bz2
         SOURCE2=sa.diff.bz2
SOURCE_DIRECTORY=$BUILD_DIRECTORY/$RNAME-$VERSION
   SOURCE_URL[0]=http://www.apache.org/dist/spamassassin
   SOURCE_URL[1]=http://old.spamassassin.org/released
  SOURCE2_URL=$PATCH_URL
      SOURCE_VFY=sha1:f38480352935fe3bb849a27a52615e400dee7d66
     SOURCE2_VFY=sha1:facd659e3c83334d55392efdf4f4e949acc69834
        WEB_SITE=http://spamassassin.org
         ENTERED=20020619
         UPDATED=20110618
           SHORT="Mail filter to identify spam"

cat << EOF
SpamAssassin is a mail filter to identify spam.
Using its 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.
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. SpamAssassin tries to spot these.
* text analysis: again, spam mails often have a characteristic style (to put
  it politely), and some characteristic disclaimers and CYA text. SpamAssassin
  can spot these, too.
* blacklists: SpamAssassin supports many useful existing blacklists, such as
  mail-abuse.org, ordb.org or others.
* Razor: Vipul's Razor is a collaborative spam-tracking database, which works
  by taking a signature of spam messages. 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.
SpamAssassin requires very little configuration; you do not need to continually
update it with details of your mail accounts, mailing list memberships, etc.
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 implement a Mail::Audit plugin,
allowing SpamAssassin to be used in a Mail::Audit filter, or (possibly at some
point) in a spam-protection proxy POP/IMAP server.
EOF
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