AOL members complain

I replied to an email from a friend of mine that uses AOL for her email. About 10 seconds after replying, I got an email from AOL that said my message was not delivered. The email directed me to a URL that contained the reason why it wasn't delivered. A screen print of the URL is below. Notice the reason, which appears under the heading "EXPLANATION:". Click on the picture if you're having trouble reading it.

There was only one URL in the email.

http://www.aol.com