Carlton, it is not an invalid e-mail address issue. You have the choice to have your e-mail public or not so that is a site option (as it should be)

Additionally, I can't find how to get a list of all users. Is there such a thing? I sent him the last PM which read "I will tell you the shipping price on Friday"

Friday rolled around and I could not PM him because I was the last to send. He probably thought oh well he is not getting back to me and that is exactly what I was trying to do.

The PM's should be more user friendly then. If that was the case then this would not even be an issue.

Either way I know a way around it.