10.8.5 update killed Exchange Mail account

OS X Mail: Troubleshooting sending and receiving email messages

I am also having problems since the 10.8.5 upgrade. For whatever its worth, I am only having problems with Apple Mail. Unfortunately, the problems with Apple Mail led me to set up Outlook on my Mac and that works fine. Mail also works on my iOS devices. Only on my MacBook and only since the moment I upgraded to 10.8.5.

I have the same problem. Tried to delete / add the Exchange account - doesn't help.

Same here, problems only with Apple Mail linking to the Exchange account, and not with the iOS devices, and not with other accounts.

I have the same problem on the recently launched MacBook Pro. My exchange account works on my other macs and my iOS devices but not the new MacBook 😟