Obligatory MobileMe Filtering
Mike Conley on MacInTouch (via Gary Robinson):
It’s fairly clear to me that Apple is silently filtering outgoing E-mail; no notice is given when a message is dropped. On what grounds they feel it reasonable to do this and using what criteria are not clear to me, but, as far as I’m concerned, there is simply no justification for this policy.
He also notes that, as of last summer, it’s no longer possible to turn off MobileMe’s junk filtering of incoming messages. This means that good messages can end up in a Junk mailbox even though SpamSieve didn’t think they were spam. If you care about your e-mail, you should have your own domain name. Otherwise you are at the mercy of a particular host’s policies and availability.
Update (2011-07-08): Cult of Mac noticed filtering of outgoing messages, too, and got confirmation from Apple that they spam-filter sent messages.