Hey guys I thought i would ask over here about a problem im having with my email. I have out look express Windows XP. I hit send on the email an it says something about this address is not listed and I can not send the message. I never had trouble before and now can not send anything. Anybody know where to find out how to fix this. What can i do? Fristrating to say the least when you need to send a message quickly an this.