I've had a BT email id for years so even though I'm with Pipex ADSL now I still use the BT email. BT have recently said that we need to use authentication in order to continue to send SMTP email. I use Outlook Express for my email client. The problem is that whenever I select "My server requires authentication" on the settings, every time I try to send an email a popup appears asking me to the following server - smtpauth.dsl.pipex.com. I have tried using the userid/password for my BT email id and the userid/password for my Pipex userid, but the popup just keeps reappearing - i.e. the details are not accepted. Can anyone help?