topic Re: btconnect e-mail in Email and hosting

btconnect e-mail

DipStik — Tue, 07 Apr 2026 14:53:58 GMT

Hi All

My wife's Outlook btconnect e-mail has suddenly stopped working and it now tells me that the e-mail address does not exist. When I try to reinstate it with a new password I get a 403 error or Fix NDR error "550 5.1.0" in Exchange Online.

I am not sure if this is a BT issue or a Microsoft 365 authentication problem.

Has anybody got any ideas I can try only it's caused considerble inconvenience.

Many thanks

John

Re: btconnect e-mail

BethM — Wed, 08 Apr 2026 11:27:34 GMT

Hi John

Please contact the technical support team regarding this, they can assist.

Re: btconnect e-mail

DipStik — Mon, 13 Apr 2026 08:11:46 GMT

Hi Beth

This is a Microsoft Co-Pilot response from my efforts to recover my wife's btconnect e-mail:

@btconnect.com accounts cannot be recovered

…because BTConnect email accounts that fail login on both Microsoft and BT sites have been permanently retired by BT and Microsoft.

This is not a password issue.
It is not an account‑lock issue.
It is not something BT support can restore.

This conclusion comes directly from published BT and Microsoft information:

BTConnect.com mailboxes were hosted on an old Microsoft system using Basic Authentication, which Microsoft has fully retired — these accounts can no longer sign in and cannot be reactivated. [maidenheadcs.co.uk]
BT support has confirmed that BTConnect accounts are no longer supported by Outlook or Microsoft’s login systems, and customers are advised to migrate to a new email provider. [learn.microsoft.com]

When both of these occur:

✅ Outlook says “email does not exist”
✅ Microsoft login rejects the address
✅ BT’s email login also rejects it

…it means the account is gone from the authentication system and cannot be re‑enabled.

Regards

John

Re: btconnect e-mail

BethM — Mon, 13 Apr 2026 11:10:43 GMT

Hi DipStik

You need to talk to the technical team to find out what can be done, I would advise to do this rather than relying on Co-pilot.