It sounds like your browsers are using cached portions of the old <a href="http://www.maccodes.co.uk" target="MAC">Orange</a> email page. Try clearing your browsers cac ...
My email is now working again, I complained about it again to Orange and explained that the page was full of their adverts. Orange admitted they had a problem and that their tech guys were working on ...
We are having the same problem, it started last Thursday. The email page is full of adverts from Orange and like you say will not open to be able to write a message.