This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Thunderbird won't send email on one Outlook365 account, will on another.

  • No replies
  • 0 have this problem
more options

Hello All,

So I have two exchange accounts. Both were working until a recent Thunderbird update. Now they both will receive email, but only one will send. The offending account will spine for a bit on send and error out with the change password or retry. Both do not work. I have tried everything from recreating the account to creating a new SMTP account. I am at a loss at this point. Any help is greatly appreciated.

I am using,

Thunderbird 128.4.1esr (64-bit) Avast as in the pic. Also the SMTP setting in the pic. These are the same as the account that is work bar the credential change. This on Windows 11.

Hello All, So I have two exchange accounts. Both were working until a recent Thunderbird update. Now they both will receive email, but only one will send. The offending account will spine for a bit on send and error out with the change password or retry. Both do not work. I have tried everything from recreating the account to creating a new SMTP account. I am at a loss at this point. Any help is greatly appreciated. I am using, Thunderbird 128.4.1esr (64-bit) Avast as in the pic. Also the SMTP setting in the pic. These are the same as the account that is work bar the credential change. This on Windows 11.
Attached screenshots

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.