2 email clients and Webmail can’t access mail server

[FloFosterJenkins]

Primary email address. iPad Mail requests password and rejects the login. Outlook on Android phone does the same. Webmail won’t let me in and has locked me out for 20 minutes.

I haven’t yet tried deleting the Mail account on the iPad and reinstalling because it looks like that won’t work if the Webmail server is rejecting the correct data.

Is anyone else suffering this?

[FloFosterJenkins]

This a mess.

I reset my password and can access emails from the Outlook client on Android using nnnn AT btopenworld.com and the new p/w. But webmail doesn't allow this. It does permit nnnn AT btinternet.com to access webmail, but I've never done this before.
 Now I can't access my basic BT account (via the normal nnnn AT btopenworld.com and the reset p/w) and have been locked out again.

I'm also having trouble logging into this BT Community site (using the dedicated username and p/w) . It tells me I've entered the incorrect p/w but then allows me in to post this.

[gg30340]

The email suffix btinternet.com and btopenworld are interchangeable for the purposes of your email address being received and delivered however it may be the case that since BT made security changes to the way BTMail and MyBT is accessed using Two Factor Authentication that the username may have to be using the btinternet.com suffix.

Two Factor Authentication is not required when using an email client so it may be that because of that the btopenworld suffix is allowed through.