Canning spam, Question No. 3 |
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| 21 Apr 2005 | SearchSecurity.com |
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3.) What is the name for a denial-of-service attack that results from mail transfer agents (MTAs) sending bounce messages to a valid source address that has been spoofed in spam?
Answer from Oops! Exposing the biggest blunders for fighting spam and viruses:
It's even worse if the spammer puts in a valid address. You now send a bounce message to someone who didn't send the e-mail in the first place. In the quantities that spammers send their junk around, this amounts to a denial-of-service attack. There's even a name for it: a "Joe job" attack. The last time this happened to my company, we collected over a million bounced messages from MTAs that had accepted mail they couldn't deliver -- and then wanted to return it to us. That's a lot of really stupid MTAs. (Read the rest of this article)
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