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Problem with sending mail from Thunderbird using OAuth2

Anonymous
2024-07-02T16:02:51+00:00

I have two hotmail accounts and use Thunderbird as my email client. A few days ago I received an email from Microsoft telling me to change my authentication method to OAuth2 from password verification. The email directed me to the page https://support.microsoft.com/en-gb/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90d. 

This page contains instructions for updating Thunderbird settings to use OAuth2. I followed those successfully (apparently). I can receive mail and manage messages on both my hotmail accounts with the new settings. However, sending is a problem. I can send from one of my accounts without difficulty. However, attempts to send from the other account are rejected. I receive a message saying:

"Sending of the message failed. An error occurred while sending mail. The mail server responded: SendAsDenied; ******@hotmail.com not allowed to send as ******@hotmail.com." (For privacy, I've replaced my real email addresses in the text with xxxx1 and xxxx2.)

I have tried setting up two identities, one for each email address, on the Thunderbird outgoing server. However, this does not resolve the problem. It appears that the Microsoft instructions for changing Thunderbird settings to use OAuth2 does not cover the case of those using Thunderbird with two separate hotmail accounts (as many do, for example, one for work and one for personal matters).

I would be grateful for advice on how to resolve this.

Thanks,

Peter

Outlook | Windows | New Outlook for Windows | For business

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  1. Anonymous
    2024-07-04T14:01:55+00:00

    Problem solved!

    I discovered that the new authentication method appears only when a specific SMTP server is listed and saved in Thunderbird,

    I had SMTP-mail.outlook.com as the server, but OAUTH2 appeared as a choice only after I changed it to SMTP.office365.com.

    DougR

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  2. Anonymous
    2024-07-12T10:57:28+00:00

    I'LL GIVE YOU A REPLY -

    THIS IS TYPICAL MICROSOFT IDIOCY, THAT USERS OF THUNDERBIRD AND OTHER INDEPENDENT APPS HAVE TO SUFFER FROM LEGACY ASSOCIATIONS WITH WINDOWS.

    YOU MAY ENJOY TINKERING WITH SETTINGS AND 'IT DEPARTMENT' LIFE BUT FOR REGULAR PPL THIS IS STUPID SECURITY AT A CORPORATE LEVEL - EVEN TO SIGN IN TO THIS FORUM!

    ULTIMATELY THE BLACKMAIL OF HOTMAIL ETC ACCOUNTS 'MYSTERIOUSLY' NOT CONNECTING MONTHS BEFORE THE SEPTEMBER DEADLINE IS JUST MICROSOFT HOPING THAT LAZY PEOPLE WILL JUST GIVE UP AND GET THE OUTLOOK APP. A 'KNOWN BUG' YEAH RIGHT.

    PATHETIC CORPORATE GREED.

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  3. Anonymous
    2024-07-10T14:27:54+00:00

    Thank you, Peter.Y, for your efforts on this. However, after further investigation, I have found that it is possible to edit the outgoing smtp settings to resolve this problem - making it unnecessary to delete and reinstall the second account.

    The solution is to edit the settings using the Outgoing Server link tied to individual account on the 'Account Settings' page - NOT the main Outgoing Server link at the bottom of the main left-hand menu on that page. The Outgoing Server link which SHOULD be used is at the bottom right of the display when viewing each ******@hotmail.com link on the left-hand menu.

    The image below shows the link through which the outgoing server should be edited when multiple accounts are present. Using this link resolved my sending problem.

    I hope this may help anyone else who has this problem.

    Regards,

    Peter

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  4. Anonymous
    2024-07-03T13:12:00+00:00

    Peter,

    I have a related issue with the latest version of Thunderbird and the authentication changes for Outlook.

    Changing the incoming server authentication method went smoothly, but when I went to the outgoing SMTO server settings, OAuth2 was not an option. I tried deleting the account and re-adding it, but OAuth2 was still not offered as a choice.

    What should I do?

    Thanks,

    DougR

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  5. Anonymous
    2024-07-12T01:35:47+00:00

    Dear Peter_C(2)

    Thanks for the reply and the solution!

    We're glad your issue has been resolved and we appreciate your feedback, you can help us improve the support experience and help others with similar issues by clicking "Yes" or "No". Thank you for your cooperation.

    Best Regards,

    Peter.Y-MSFT | Microsoft Community Support Specialist

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