Someone has entered my email account and is sending viagra messages to friends on my address book, I am even g?

friends on my address book. How can I stop this as I am even getting failure to deliver notices/ Help please.

Answer:

1. Change your password
2. Failure to deliver means that the person that you are trying to email had identified your email address as spam and wont let it go through.

Change your password and wait a day or so.