I've had this problem a few times, actually; where the mailbox is shown to be constantly loading without fetching any mail at all. My alternate email is working fine, however.
Oh, and whenever I try to delete a message (or a few), Mail becomes unresponsive...
Any ideas what's going on, or how to fix it?

Oh, and whenever I try to delete a message (or a few), Mail becomes unresponsive...
Any ideas what's going on, or how to fix it?