Outlook Express

You can block any incoming e-mail by adding the offending e-mail to the Blocked Mail List but why would you want to return it?

This is going to cost you in uploads as you pay to download the e-mail and they you would have to upload it and increase your ISP usage and probably what you pay in excess usage fees.

If you are not concerned about extra fees you can contact your ISP and get them to block any messages from this person so you are never aware of them again.

Col