The message queue appears to have become corrupted and was jamming up. I’m not sure what would have caused that, but probably it was someone who didn’t even have a penis being sold viagra. The amount of spam the poor e-mail servers in the world have to deal with these days is incredulous.
Anyway, I have removed the queue, and restarted the mail process. Any notifies that were from before this time will not be sent. With any luck though, any new ones will be.