My ATT IMAP Mail account will not receive mail unless I rebuild the mailbox.
Hi - I have one ATT IMAP Mail account that does not receive mail promptly, often taking hours or even days to arrive unless I rebuild that particular mailbox. Another IMAP account with a different provider works fine. I have tried to figure out the problem with ATT, but they seem to think the problem is Apple Mail. I know the mail should be arriving because I can see it in in webmail, but it doesn't arrive until immediately after I rebuild. What's up with this and how do I fix it?
iMac, OS X Mountain Lion (10.8.4), 3.4 GHz Intel Core i7