You can delete an email account when the account
is no longer needed. You can not delete your default account.
Warning: Make sure you download any mail that
you want to keep, as deleting the account will delete all of the mail still
in that account. You can not recover this information once the account has
been deleted.
To delete an email account:
Click on the Add / Remove accounts link in the Mail Menu area.
Click on the Delete button next to the unwanted email address.
Click on the YES button.
Check
out Ongoing and Completed Sites @ Webmaintainer