Doh! It's always something. I had to set up a new aliases to allow microsoft to forward email feedback/rejections to me (to help stay off their naughty list) and apparently since the last time I set up an alias, they changed the format of the alias file, so I started a new one. I somehow didn't realize that I had the setting enabled so that ONLY aliased accounts get delivery. E.g. I have to do "kschnee: kschnee" or email doesn't go through, instead of only keeping redirection in there. So yeah, all the vanity domains and stuff worked, but not main accounts. I didn't get any email on my xepher account for the past 24 hours either, but the ones aliased to my real name kept coming through (it forwards to the same account) so I didn't realize anything was wrong.
Anyway, it SHOULD be fixed now. Sorry for the trouble, and please let me know if you have further problems.