Another development - things just seem to be changing.
I read in a help file that the Port no. should not be changed unless instructed to do so by BT. So I changed Port 110 back to 995 and Port 25 back to 465 - these were the nos automatically inserted by BT/Yahoo. Have just tried to send an email and got the message : You are about to overide how TBird identifies this site. Legitimate banks, stores and sites will not ask you to do this. mail.btinternet.com 465 This site attempts to identify itself with invalid information. Certificate belongs to a different site which could indicate an identity theft. Cancelled sending. Ports 110 and 24 do not seem to work. Dont know where to go from here.