That address works for me, perhaps its just a temporary glitch. Try restarting your home hub.
Forumhelp (Private website) Lots of additional information and help.
You will need to be connected to your home BT Broadband connection to view it, or any links to it that I post on this forum.
When I type it in, it works, I was following a link in one of the pages here:
The link titled "sign in to BT Yahoo! Webmail"
and it points to bt.yahoo.com/webmail
and it didn't work for me.
Its OK now I know what to do, thanks.