Let's face it. Windows Mail is buggy.
Try upgrading to Windows Live Mail:
http://get.live.com/betas/maildesktop_betas
Gary VanderMolen
"Dave Mc" <DaveMc DeleteThis @discussions.microsoft.com> wrote in message news:95A190A3-E0E4-45A3-843E-6FCFC1694B23@microsoft.com...
> When I try to send mail in Windows Mail, it just sits in the out box and
> refuses to budge. If I close Windows Mail and then open it again, send and
> receive magically works, until I do another mail, then it sticks again.
> Anybody know the answer??