Is there any way to REALLY remove email account details from OSX Mail app...????
Removing an account via Mail > Prefrences does not remove the folder where Mac OS X Mail stores related account data.
To remove this folder:
- Open a Finder window
- Menu: Go > Go to Folder...
- Type: ~/Library/Mail/V2
- Click the Go button
- Identify the account's folder:
- Right-click the account folder, and select Move to Trash from the pop-up menu
As always, when you're deleting folders/files, please exercise caution. If you delete something by accident, go to the Trash, and put it back.