A joe job is a spamming technique that sends out unsolicited e-mails using spoofed (falsified) sender data. Early joe jobs aimed at tarnishing the reputation of the apparent sender or inducing the recipients to take action against him, but they are now typically used by commercial spammers to conceal the true origin of their messages.
The name ‘joe job’ originated from such a spam attack on Joe Doll, webmaster of Joe’s Cyberpost. One user’s joes.com account was removed due to advertising through spam. In retaliation, the user sent another spam with the ‘reply-to’ headers forged to make it appear to be from Joe Doll. Besides prompting angry replies, it also caused joes.com to fall prey to denial-of-service attacks that temporarily took the web site down.
The Daily Omnivore 
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