Just had same problem using mobile
"this site can't be reached" but using my tablet is fine. Weirdly the URL address is slightly different, tried copying the working one (tablet) into the mobile but still got "this site can't be reached".
But can still use the mobiles mail app tho' it's very limited.
Here is a site that explains where the email is down.
https://downdetector.co.uk/status/bt-british-telecom/
Mike.
Cannot get e mail on main computer or mobile but can get them via Tablet using Bing
I tried messaging Tech support, they said it could take up to 24 hours to fix it
@Ali_Awrote:@englandjeff
Are you able to log into your email via BT Email Login?
Ali
Why have you replied with this comment when you know full well that email is currently faulty?
Please respect the community when you get swathes of similar issues in a short space of time,