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Cannot send emails through Thunderbird

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Whenever I try to send an email through Thunderbird, I am asked to re-signin to my Google account. No matter what I put in the text box marked "email or phone", it will simply empty the text box and ask again. I can never get to the password phase.

This does not happen when logging in to my Google account in Firefox, so it must be an error on Thunderbird's side.

I still receive my emails, but I simply cannot reply.

For the record, this used to work, it only stopped working a month or more ago (I don't send many emails); I don't recall if I had updated Thunderbird around the time I encountered this issue.

Thunderbird version 68.9.0, ISP Shaw, Email provider Google.

- Nic

Whenever I try to send an email through Thunderbird, I am asked to re-signin to my Google account. No matter what I put in the text box marked "email or phone", it will simply empty the text box and ask again. I can ''never'' get to the password phase. This does not happen when logging in to my Google account in Firefox, so it ''must be'' an error on Thunderbird's side. I still receive my emails, but I simply cannot reply. For the record, this ''used to'' work, it only stopped working a month or more ago (I don't send many emails); I don't recall if I had updated Thunderbird around the time I encountered this issue. Thunderbird version 68.9.0, ISP Shaw, Email provider Google. - Nic

Chosen solution

What's the authentication method on the account? It looks like it's OAuth2 for the incoming, but confirm it's OAuth2 for both the incoming and outgoing. Confirm that cookies are enabled in TB Options/Privacy. Turn off a VPN if you have one. If the authentication is changed, delete the passwords in Options/Security/Passwords/Saved Passwords, restart TB, and enter the account password in the OAuth browser window when prompted.

For the record, the relevant file is key4.db, not key3.db, and it and logins.json and cert9.db should all be deleted at the same time if a complete password reset is necessary.

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All Replies (7)

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I'd also like to note that I've already previously tried reinstalling Thunderbird, to no help.

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In Google, are you using two-authentication protect ?

If your relogin into gmail, thunderbird redownloading all the emails or just asking only the login details ?

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I am using two factor authentication, but I have been using it since before this issue started.

I don't understand your second question. I am asked for my login details, but the page seemingly refreshes every time I attempt to submit them. This issue does not happen in Firefox, so it must be Thunderbird related. I can still receive emails through Thunderbird despite this - I just can't send emails.

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Firefox is browser, there you can't access gmail without internet, but in thunderbird all your email will be downloaded to local system. you can access that, without internet.

When thunderbird asking for Gmail Login details, after you entered the detail, check whether thunderbird downloading all your emails from google server (you can see that on right bottom corner).

If its not downloading, then thunderbird not saving login details, issue in thunderbird profile.

  • Help > Troubleshooting Information
  • click on 'show Folder' button

A new window opens showing profile folder name.

  • Close Thunderbird now - this is important
  • Scroll down - locate and delete this file: key3.db
  • Close window - top right X

Restart Thunderbird.

At the prompt to enter password, enter password and select the "Use Password Manager to remember the password" checkbox and click on OK.

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I can and have received new emails, which I can view through Thunderbird. Even throughout this conversation, I have received and read new emails.

I know for a fact that is working.

That is not my issue.

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Chosen Solution

What's the authentication method on the account? It looks like it's OAuth2 for the incoming, but confirm it's OAuth2 for both the incoming and outgoing. Confirm that cookies are enabled in TB Options/Privacy. Turn off a VPN if you have one. If the authentication is changed, delete the passwords in Options/Security/Passwords/Saved Passwords, restart TB, and enter the account password in the OAuth browser window when prompted.

For the record, the relevant file is key4.db, not key3.db, and it and logins.json and cert9.db should all be deleted at the same time if a complete password reset is necessary.

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Cookies were disabled.

I re-enabled them and the issue was fixed.

Thank you very much sfhowes!

- Nic