Same issue here, if I try to logon using Firefox then cannot access emails, but if I use Chrome then no issues. Also no issues on Iphone.
I posted this way back on page 7 of this thread, it seems one one has tried it yet.
I have sorted the problem out by refreshing Firefox, just open Firefox and click on help at the top of the page > Troubleshooting information > Refresh Firefox, this should work but you may have to reinstall Add-ons.
I knew two days ago it was a Firefox problem, it was obvious as other browsers weren't affected. I'm surprised that other people who use this site have not tried my suggested fix, it worked for me and two of my friends.
You are wrong, it's nothing to do with BT, the only people I know who had the problem are Firefox users.
Have just tried your recommendation and it has worked thank you, keeping fingers crossed that is going to be it.
Either McAfee Web advisor or firefox would have been updated to make it a " firefox problem" or the BT interface has been changed. As far as I can ascertain Firefox has not been updated.
BT supplies Mcafee web advisor and the Email server, I would suggest that BT needs to examine whether either of these have been updated.
This "fault" also impacts access to manage your BT account via BT.com
McAfee web advisor being disabled during login is a work around, but it may take several attempts to achieve a succesful login.