THREAT MONITOR
Creating an antispam cocktail: Best spam detection and filtering techniques
Al Berg
08.17.2005
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While admins have a variety of weapons at their disposal in the fight against spam, no single weapon is capable of providing the ultimate death blow, killing all spam in its tracks. Fighting the daily torrent of spam, which (depending on who you ask) makes up 33-80% of all e-mail, requires the use of a "cocktail" approach, mixing multiple detection and filtering techniques.
An antispam strategy – whether that strategy is you or a vendor product – should incorporate three techniques, which complement each other to provide antispam defense where others fall short. Let's take a look at these three vital "ingredients" that should be part of any antispam coc
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ktail.
As you can see, each of the ingredients in this antispam cocktail adds its own "kick" to the recipe. By combining and tuning these techniques, the savvy sys admin can reduce the level of spam on their network to a trickle instead of a torrent.
About the author
Al Berg, CISSP, CISM is the Director of Information Security for Liquidnet (www.liquidnet.com). Liquidnet is the leading electronic venue for institutional block equities trading. According to INC. magazine in 2004, Liquidnet was the fastest growing privately held financial services company in the US and the 4th fastest growing privately held company in the US across all industries.
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