Gerry_Atrick and Malacath
There have been problems with the BT IMAP/POP servers stopping email clients from accessing the users email account for years. The advice from forum users is to do nothing such as changing passwords or deleting and resetting up accounts as this invariably causes more problems than it solves, The problem usually resolves its self in a day or two.
Gerry_Atrick
I presume that you can still send and receive emails when you use webmail. If that is the case it is obviously not a problem with your email accounts or with your password.
Because the problem started when you changed your password I would suggest that you do the following:
Switch off all your devices / Outlook that usually access your email or at the least stop them from polling your email account for new email. You can do this by either deleting the email account from the device or just change the email address in your email account settings.
Change your webmail email password yet again. Check that you can access your email account via webmail.
Wait at least one hour before starting one of your devices or Outlook and set up the email account with the new password.
Check that this device is working before moving onto the next device.
Ensure that you are using the correct settings via this link and set the email accounts up manually rather than using the email wizard.
https://bt.custhelp.com/app/answers/detail/a_id/44917/kw/bt%20mail/c/6591
