Hi Theresa - I didn't realise how complicated this would be, I thought maybe it was just a question of tweaking a setting, only I can't see any way of accessing a 'settings' window in my email programme, if you see what I mean!
I did try care2.com's support link before coming on this forum, but all the advice I received was to use Internet Explorer for accessing care2.com - which I do anyway, and have always done.
I'm beginning to think it may be the computer itself : as I mentioned, it's new one and has Windows 8 (which I find very tricky in lots of respects). I may investigate that route, if only to eliminate it.
I really appreciate your interest in the issue, and the effort you have made to find out what's going on - it certainly seems that care2.com are being less than helpful!
all the best, evie