My New Outlook will not connect with my bt email
Are you presently a BT Broadband customer or are you paying for your email through a BT Premium email account or did you migrate to EE Broadband?
If none of the above your email account may have been downgraded to a BTMail Basic account which can not be used with an email client or email apps.
See link
https://www.bt.com/help/email/bt-email-products
If you are have you checked the Outlook settings are as per this link.
My BT email account is a 'Standard' account.
Have you checked the second part I mentioned?
What happens when you try to use Outlook?
All settings are correct but New Outlook does not receive or send emails and i have lost the use of Classic Outlook.
Re-check your settings and make sure that you have not ticked the box "Require Secure Password Authentication".
Also make sure that for the Outgoing server it is ticked "use same as my incoming mail server"
Have checked both and they are as you instructed them to be but still not syncing.
Can you still access your email account using webmail (on a browser)?
What device are you using this on?
Can you try a different email client such as Thunderbird or if using a mobile device try Bluemail or even the BTMail app to see if the problem is with Outlook.
I can access my BT email account using webmail with no problem.
I have recently changed form a PC (1 years old) to a new HP laptop and loaded MS 365.
The New outlook worked for about a week then for some reason just stopped.
I changed to Classic outlook but that just get kept send/receive and outgoing
mail got stuck in the outbox until i came out and went back in again.
I can now not access classic outlook either.
Have you tried Thunderbird?