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Able to Receive Emails but Unable to Send Emails From Hotmail

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  • Last reply by asq32

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I'm able to receive messages in Thunderbird from my hotmail account but am unable to send them. This problem started the version before 115.4.3. This use to work. I have not changed any settings. I've tried removing the account and re-adding, but that didn't fix the issue.

The error message is: Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) smtp.office365.com. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'.

Attached are images of the servers settings I have.

Help!

I'm able to receive messages in Thunderbird from my hotmail account but am unable to send them. This problem started the version before 115.4.3. This use to work. I have not changed any settings. I've tried removing the account and re-adding, but that didn't fix the issue. The error message is: Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) smtp.office365.com. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'. Attached are images of the servers settings I have. Help!
Attached screenshots

Chosen solution

The authentication method for incoming and outgoing should be OAuth2. Remove the entries for the account from Saved Passwords in Settings/Privacy & Security, accept cookies in the same section, restart TB, enter the account password in the OAuth window to allow TB access.

https://support.mozilla.org/en-US/questions/1417298#answer-1588949

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Chosen Solution

The authentication method for incoming and outgoing should be OAuth2. Remove the entries for the account from Saved Passwords in Settings/Privacy & Security, accept cookies in the same section, restart TB, enter the account password in the OAuth window to allow TB access.

https://support.mozilla.org/en-US/questions/1417298#answer-1588949

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That did it, thank you!