fighting spam

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  • The last line of defense against spam

    Posted February 2, 2009 - 5:47 am

    Many organisations that implement an email anti-spam solution will apply a multi-layered approach. They will implement a system that includes content filtering, IP block lists, quarantine of suspected spam items, Bayesian detection, and other important features.

  • Is Canada a Spam Haven?

    Posted December 11, 2008 - 10:46 am

    The spammer that Facebook won a landmark $873 million settlement against last month operated out of Canada, leading to criticism of the country’s lax anti-spam regulations. They did attempt to address the problem of spam in 2004 when they formed the National Task Force on Spam.

  • How to decode Spam Headers

    Posted December 4, 2008 - 11:42 am

    Spammers know that they can be tracked through the “Received:” lines in the headers. Therefore, they often attempt to obfuscate the headers to confuse matters. Although “Received:” headers can also be forged, it is somewhat more difficult than simply forging the return address.

  • Spam Goes Down To The Letter

    Posted October 13, 2008 - 7:51 am

    A new study by a University of Cambridge computer scientist revealed that the first letter of your email address makes a difference in how much spam you get. It found that addresses that start with “A” “M” or “S” get more than 40% spam while those starting with Q or Z get only about 20% spam.

  • Anatomy of a Spam Virus

    Posted October 13, 2008 - 6:47 am

    A botnet created by a trojan virus is sometimes referred to as SpamThru. According to the Don’t Bounce Spam organization, spammers have become very sophisticated in the way they manage their botnets , and the SpamThru Trojan is the leading example. In at least one case the botnet consisted of over 73,000 computers.

  • To Fight Back, Read What Spammers Read

    Posted October 3, 2008 - 10:47 am

    The Internet Engineering Task Force provides RFC2821, which is an excellent reference for understanding the details of email transport protocols. In order for email administrators to know what they are up against, in thwarting spammers, RFC2821 should “the” primer to ingest.

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