From: Pittsburgh, PA
From what I can tell, it's a combination of issues. One being that some email providers think our AOTD content is spam because they include links to eBay in some cases. The other being that someone else sharing our mail server is an actual spammer, so we've been fighting a mail IP blacklist and imploring our service provider to move our mail to a different server.
What's making me particularly frustrated is that Comcast isn't sending our bounces, and without them, the low-level peeps I've been dealing with are clueless about what's actually going on and how to fix it since other messages from us are getting through to Comcast customers.
Get out of the vacuum and express yourself!