Thanks Ozen

If nothing else I have learnt that there's a few 1and 1 users!

I have reverted to pop, and have incoming again. I've checked their settings and Mike is right, its auth.smtp.1and1.co.uk

When I try and send I'm now getting a message saying unable to connect to smtp server.....and that is with wi fi switched off

with wifi on it just says failed

Maybe there's a clue there somewhere as to what's going on?