Thanks... Here's what I did:
1. Went to "Set up Internet Email" on BB
(THIS WAS THE STEP THAT SOLVED MY PROBLEM)
2. Clicked on "E-mail Accounts"
3. Clicked on the acct that I wanted to delete
(xxx@yahoo.com)
4. Clicked on delete
5. Removed battery for about 10 seconds
6. Replaced battery, and it was gone.
Now that I'm looking at this, I probably didn't have to delete the
[CMIME], which was under ... Options > Advanced Options > Service Book .... I think that it probably would have been automatically deleted by just deleting the account under "Set up Internet Email".... I'll experiment...
Thanks everyone for helping me on this, and Happy New Year!!!