I got home from work tonight and had 75 new emails in my box (this is in less than 10 hours) with the subject line “Re: You’re using my old e-mail address.” Most of them were from different people/domains but there were a few repeats. I only opened one and it said something like “I’m not using your old email address, stop emailing me.” I checked my outgoing mail just to make sure someone hadn’t been sending mail from my account and I didn’t see anything unusual. What kind of scam could this possibly be?
I don’t think anyone’s quite sure, but it seems to have something to do with the SDMB. Someone may have been harvesting email addresses from here. A lot of dopers got the same thing. See http://boards.straightdope.com/sdmb/showthread.php?threadid=111995
Er… not to imply that the SDMB has anything to do with the offending emails, just that many people on the board seem to have gotten them. 
I’ll close this thread since the problem is already being discussed in other threads.