Well, AOL saw a couple dozen identical e-mails coming from a single server and freaked out. Never mind that it shows none of the hallmarks of spam—lots of random HTML formatting, references to prescription drugs/porn/African coups, deceptive headers. This is something with a tag in the subject line, the proper mailing list headers (including a "Precedence: bulk" header, for God's sake), a constant From: line, and coherent content. If a human looked at this, I think they'd conclude within about five seconds that it was legit. But hey, they're the biggest ISP in the Western world, they don't have to be a good citizen, right?
So now I get to jump through their hoops. Assholes.
 Okay, 1300 addresses (out of 6000 or so). Still, you'd think they could get a human being involved.