Yes it was a coincidence - unless your logging in fixed it for
everyone!
https://www.bt.com/consumerFaultTracking/public/faults/tracking.do?pageId=31&s_intcid=bbhub_box:C_servicestatus
Towards the bottom of the broadband/email section.
"Fri 14/08/2015 at 20:06 Resolved BT Yahoo Mail Issues
More details
Time resolved:
We're aware there was an issue preventing some BT Yahoo customers
from sending and receiving emails via email clients (Outlook and Apple
Mail etc.) You can still access your emails via BT.com
The problem has now been resolved and we apologise for any
inconvenience caused. "
--
AnthonyL