Back from a few days away from this glitch.
Wodrick: Tried change of Port, still no send, same error box
BOAC: Yes, still here, and indeed working in the Advanced tag.
spanners: Yes, in both Servers and advanced tags, I set 'This server requires SSL' for outgoing just as works fine on my XP machine. No joy with Win 7 however. No joy with boxes unchecked either btw.
Loose Nuts: I downloaded T'bird and used its auto set up. It set up 'mail.yahoo' as the servers and I couldn't send or receive. Manually changing to 'mail.btinternet.' Didn't work either.
Beags: I got Office 2010 Home and Student with the computer, but neither OE nor OE Express is included. Damn
Had a look at all those frustrated comments in the hate forum. Why would Microsoft take such a step backwards?
I assume (if I ever get this to work) that my emails are no longer stored on my computer at all, but left on the server at the whim of Yahoo or BT to delete as they wish? Hardly satisfacory if you want to keep something important is it?
Now back to Thunderbird, see if I can get it to work.
So much valuable time being wasted on something which should be so easy. It used to be!