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Many administrators like to turn on multiple scanning filters on their network to help protect against spam, viruses, and specific potential harmful attachments. With multiple types of scanning software, this can be a good redundancy option in case one vendor lets one slip through, the other most probably will block the email. What administrators doRead more

Kids, today I will tell you the story of a legitimate message that wanted to be a spam. Once upon a time, a legitimate Dell email was being sent to customers. For years he was treated as a boring legit. But one day he decided he wanted to be someone: he wanted to look likeRead more

When the infamous Rustock botnet was taken down, it helped reduce one third of all junk email being sent. Botnets are responsible for an average of 88% of all spam sent globally. For anyone new to the term, a botnet is essentially a network of infected computers (i.e. zombie computers) operated by criminal entities, whichRead more

The mechanics of detecting a spammer on your network are fairly straightforward. They will spam through your network in two ways: Via a compromised host on your network: an infected machine has become a bot in a botnet and is sending out spam directly to the Internet. Via a compromised mail account: the spammer uses oneRead more

    A couple days ago, a fellow anti-spam specialist posted an interesting article called “To Delete or to Quarantine? That is the Question” on the GFI blog, AllSpammedUp. I would recommend you read his article prior to this one. The author, Ed Fisher, was discussing several of the problems attached to spam-quarantine management from bothRead more