Thanks to s1000rrnapo for the detailed technical info. I'm seeing the exact same thing he descrbed:
- Mac Mail only has a problem syncing my Exchange account. Works fine with other IMAP accounts. I can see in the Activity window that it's taking forever when syncing the Exchange account.
- iPhone Mail works fine with my Exchange account.
- Here's the kicker... I've been also using a different email app on my Mac called MailMate, and it works fine with my Exchange account! In MailMate my Exchange account email shows up basically instantaneously. The difference is that MailMate doesn't work with Exchange accounts directly, it only supports IMAP. So I have that same problem email account set up as IMAP there. Wonder if that would make a difference in Mac Mail?
I did try setting Mac Mail to check at 1 minute intervals instead of automatically, and that seems to be better... though it's still nowhere near as responsive as MailMate, and the Activity window still shows that it's taking a long time when talking to the Exchange server.