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Spam Assassin |
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NetspaceOnline.net includes SpamAssassin with all
hosting accounts. SpamAssassin is a mail filter that
identifies spam. Using its rule base, SpamAssassin
uses a wide range of tests on mail headers and body
text to identify "spam", also known as unsolicited
commercial email.
Once your email address apears on the spammers'
mailing lists, it's almost impossible to remove
yourself completely; your address is already "out
there" and circulating, being bought, sold, traded,
shared and stolen on the spammers' market. For a
variety of reasons, spammers frequently use any of a
variety of methods to hide the the "From:" and/or
"Reply-To:" email addresses in their messages.
Spammers usually try to conceal their messages' true
point of origin to evade discovery of their actual
identity and avoid responsibility for their actions.
SpamAssassin utilises a number of spam
identification techniques, some of which include:
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Spammers use a number of tricks to mask their
identities, and to fool you into thinking they've
sent a valid e-mail, or fool you into thinking you
must have subscribed at some stage. SpamAssassin
tries to spot these.
Spam mails often have a
characteristic style, and some characteristic
disclaimers and CYA text. SpamAssassin can spot
these, too.
SpamAssassin supports many useful
existing blacklists, such as mail-abuse.com,
ordb.org or others.
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.
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Once identified, the mail can then be optionally
tagged as spam for later filtering using the user's
own mail user-agent application (Outlook, Outlook
Express etc)
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. |
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