The annoyance factor for individual users whose email is crammed
with pitches for pornography, absurd moneymaking schemes, and
dubious health products is fierce. But for organizations, the cost
of spam in lost productivity and burned bandwidth is astronomical.
While society is grappling with a solution to the burgeoning crisis
of spam proliferation, the pressure is on system administrators to
find a solution to this massive problem in-house. And fast.
Sys admins can field scores of complaints and spend months
testing software suites that turn out to be too aggressive, too
passive, or too complicated to setup only to discover that
SpamAssassin (SA), the leading open source spam-fighting tool, is
free, flexible, powerful, highly-regarded, and remarkably
effective. The drawback? SpamAssassin's lack of published
documentation.
"SpamAssassin" by Alan Schwartz, is the only published resource
devoted to SpamAssassin and how to integrate it effectively into
your networks. This clear, concise guide clarifies the
installation, configuration, and use of the SpamAssassin
spam-checking system (versions 2.63 and 3.0) for Unix system
administrators using the Postfix, Sendmail, Exim, or qmail mail
servers, helping administrators make the right integration decision
for their particular environments.
It covers concrete advice on how to:
Customize SpamAssassin's rules, and even create new ones Train
SpamAssassin's Bayesian classifier, a statistical engine for
detecting spam, to optimize it for the sort of email that you
typically receive
Block specific addresses, hosts, and domains using third-party
blacklists like the one maintained by Spamcop.net.
Whitelist known good sources ofemail, so that messages from
clients, coworkers, and friends aren't inadvertently lost.
Configure SpamAssassin to work with newer spam-filtering methods
such as Hashcash (www.hashcash.org) and Sender Policy Framework
(SPF).
Sys admins, network administrators, and ISPs pay for spam with
hours of experimentation and tedious junk email management, frayed
user tempers, and their sanity. SpamAssassin, together with this
essential book, give you the tools you need to take back your
organization's inboxes.
"Detailed, accurate and informative--recommended for
spam-filtering beginners and experts alike." --Justin Mason,
SpamAssassin development team
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