Go to Tools then Account settings, click on Add mail account in the drop down box Account Actions.
Thanks for the update - is it preventing BT Cloud access as well ?
I'm trying to download a couple of hundred gigs of backup with no access.
Edited to add, this was in reply to Neil's update on the 2nd page of the thread.
@licquorice I may have phrased my post badly but I can't use the method you show to add a new email address I can only access existing ones.
Thank you again for your help.
Guys out there is email server down
It certainly is and has been for some time, see post opened email is down.
They can't even get the fault message right, its IMAP not iMap which implies an Apple product.