“But we only mail people who registered at our website! How can they say we’re spamming?” In those cases where website registration includes notice that the recipient will be added to a list, and / or the recipient receives an email informing them of the type of email they have agreed to receive there is some permission involved. Without any notice, however, there is no...
Spamhaus announced today that they are rolling out a new system to detect snowshoe spammers. What is a snowshoe spammer? Snowshoe spammers send spam not from compromised servers or botnets, but from large numbers of IP addresses that they are using legitimately. They try to stay below the radar of spam filters, and so get their unwanted email through to the inbox, by looking like a lot of little...
Over at SpamResource Al talks about how sharing content is like sharing needles. If you’re going to share email templates with somebody else, you’re sharing in their reputation. Lots of good spam filters, like those at Cloudmark, Brightmail, Yahoo and elsewhere, they use what is commonly called “content fingerprinting.” Content fingerprinting is something that a lot of people...
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