The password to my Yahoo email account was hacked and used to send spam. Since I wanted to keep that account, I changed the password to a much stronger value and now the spamming has stopped. There is one remaining irritant - on my Droid X phone I several "Authentication error" notifications every day that I have to manually clear.
Does someone know how to turn OFF the notifications from a single Droid app? (in this case it's Yahoo mail)