I'm in a hotel and logged on to a public wireless network. I use Outlook Express for e-mail and I get this problem about 50% of the time when on a hotel wireless.

Basically I can receive e-mail OK but not send it. When I try to send e-mail a message box pops and asks me to:

"Please enter your password for the following server". The server shown is the one from my ISP, it then shows me my user name etc. But it won't connect

As it works around 50% of the time on public wireless it's a bit baffling - as you can see by this post, Internet Explorer works just fine. Any suggestions?