Are you aware of any bounceback, or other error message, that a sender would get?
Have you tried sending to yourself from a third party mail service (make sure to give it a bit more text then just "testing" and similar as that could get the message caught up in spam preventions)?
As far as I can see there's nothing settings wise that would prevent you from receiving emails. On what email address are you unable to receive emails? (pm me or give me a good hint as I can check the account for what email addresses you have).