I use Outlook Express. I just visited the BT site to change my password but gave up because there's no clarity about what system I'm on (Yahoo/BT). I changed nothing. Now when I open Outlook a dialogue box comes up asking for userrname my username and password. Whatever I enter it won't let me open Outlook. The server no longer connects.
Which username and password does it want? I've tried everything with no success.
Thanks. I eventually solved the problem but I don't know how or why it arose. I just kept pressing buttons like a monkey. I've never been able to understand the BT system and I've been using it for decades. I assume I'm just too stupid.