Problem is on my iPad. Using my Windows PC with Outlook I have no problems.
Incoming Server: mail.btinternet.com
incoming Port 993
Outgoing Server SMTP mail.btinternet.com
Port/SSl not displayed in Advanced
checked email address is in full. reinput password ***** immediately took me back to main screen. put in a known rubbish one you get "fail"to verify".
reset to good password ***** still cannot snd but still receive emails!!! problem not resolved.