Mac Mail Error: Mail can't verify the identity of "mail.brownrice.com"

If you are receiving this error using Mac Mail:

Follow these instructions to make this error go away:

1. Click the Show Certificate button.
2. Click the small arrow to the left of the word Trust on the next screen.
3. When change "When using this certificate:" from Use System Defaults to "Always Trust"
4. Finally, click the "Connect" button.

Done.