Thunderbird Community Forum

In Thunderbird, the "Play a Sound" feature has quit. I changed from 'Use the following sound file' to 'Default system sound for new mail' and back again. That didn't work. I tried changing the file in 'Use the following sound file'. That didn't fix it. I restarted Thunderbird and it was the same. I don't want to uninstall and re-install. Is there a fix?

Hello,

In my Thunderbird Profiles folder, I can drill down to ImapMail. I see multiple subfolders prefixed with my imap server name. eg:

- imap.server-5.com 10.85GB - imap.server-3.com 8.83 GB

and so on. The datestamp on each is different.

Within the two examples above is a large Inbox folder taking up ~8.8GB.

The size doesn't concern me as much as the fact of having two of these. I'd like to understand what Thunderbird is doing under the hood here. Does it create new imap.server-#.com folders periodically as backup/recovery folders?

I'd like to recover space where possible but if these are protective measures, I could live with that. However, if it creates future folders and replicates 8+GB of data multiple times, I'd like to know what steps I can take to free up disk space.

Thanks,

thunderbird is not sending or receiving email to a particular legitimate email address; never had this problem in the past--it's just one particular email--please stop blocking it; @inreach. garmin.com

Hello!

I am using Thunderbird 140.9.1esr (64-bit) on a Ubuntu 24.04 system. Every time I restart Thunderbird, it reverts to a little used Gmail account as the default account. I have several accounts, but my main email account is a MS365 account. I reset the setting, but every time it is restarted, the default goes back to Gmail. I have tried everything that I've found online, but cannot correct this behaviour.

Do you have any suggestions or assistance?

Many thanks!

When attempting to set up an e-mail account for Zoho e-mail I get an authentication error. It says: "Unable to log in. Probably wrong configuration, username of password." I disabled Account Hub, tried again, but this did not solve the problem, and I get the same authentication error. I tried several other things, using manual configuration, copying instructions from the Zoho website, but none of them worked. They all ended with the error message, "Thunderbird failed to find the settings for your email account." The server and port settings are correct. The username and password are correct. What is the problem?

Hello. Impossible to connect to an existing Google account. Neither to the "full" account, nor to the Contact list nor to a Calendar of an existing account. Neither to a "private" account, not to a "workspace".

When trying to connect to a Contact list, after the Oauth window and the authorisation to share data from Google accounts, the app answer "Connexion impossible" (I am a French user).

When trying to connect to Calendars, Google's window asking authorisation to share data comes back after clicking "authorise".

Using Thunderbird b150, but have tried -esr and regular TB. New install of Win11 26200.8037. Up to date Firefox. Have been trying for a week for Thunderbird to authenticate my Outlook account. Worked with Copilot. Finally found a TB setting, network.proxy.allow_hijacking_localhost, that was set to FALSE. Set it to TRUE and Outlook account authenticated. Able to finally send mail. This was last night. This morning: Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.office365.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. No changed to any programs. Have deleted Outlook saved password. Thunderbird NEVER offers to get password/authenticate. I am truly and sincerely frustrated.

If someone can help me, would sincerely appreciate.

I changed my email password on the providers web site, my phone, tablet both asked for the new password but Thunderbird has not, why can I still send and receive email ?

And don't see a place to change the server password either, I thought it would just ask.

Hi there! I cannot get Thunderbird to work with the SMTP-server of my new Outlook account. I checked and double-checked the server specifications, the password, tried OAuth2 as well as login with password. I checked that SMTP is activated in my Outlook settings. Checked Thunderbird and my MacOS for updates as well, of course. I even created a new profile in Thunderbird. The result is still always: "authentification failed". Can someone help? Thanx...

Previous Colors add-on is apparently not him compatible with the most recent version of Thunderbird which installed itself in the last few days.

Does anyone know if it updates to that plug-in is anticipated?

If not, are there any similar add-ons available?

Thanks! Bill

Hello everyone

It's been for a few days since somehow it became unable to send mail. The error message is "The message could not be sent because we were unable to connect to the outgoing (SMTP) server smtp.gmail.com. The server may be unavailable, or the SMTP connection may have been rejected. Please verify that your outgoing (SMTP) server settings are correct and try again. Problem is I cannot see any mistake in my smtp setting. Some help much appreciated. Thank you.

Taka Jimbo

Thunderbird installed a new version and would not open until I created a new profile. Now all my locally saved email is missing. The only profile I can find is the new one for my email account, dated April 2026. Where is the old profile with all my saved emails? I have no email older than April 2026 in my Inbox. POP3 email, saved to my desktop computer, is gone. Please help me find them.

Hello,

Everything working just fine last night. Wake up and Thunderbird will not retrieve emails.

Remembered this old message I got so I went through and deleted my second email address, didn't help.

https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo

Checked all settings compared to Yahoo, still won't download messages. I can even send a message with my current settings no problem, and it does login, just won't retrieve emails. Gives me a connection timeout.

Anyone have any ideas?

Allora non ci siamo capiti...ho due email e, quando compilo la posta con le nuove password thundenbird mi da errore perché legge le vecchie password che ha memorizzato. Per favore volete eliminare-formattare le mie due email che così posso reinserire??? Grazie

2 email: claudiob.vr@hotmail.it titti_vr@hotmail.com

Inviato da Outlook per Android

I asked previously and didn't find a solution. Because I still needed to get below Yahoo Mail's new storage limits (which take effect on May 5) I completed that objective the hard way.

BUT Thunderbird processed thousands of emails before choking on the single email that stopped it. What became of those emails? What do I need to do at this point?

I installed Thunderbird on a new computer running Windows 11. I use Thunderbird for 14 email accounts. I have set the folder view to "Unified Folders." In the Inbox, emails from different accounts appear twice—sometimes they do, sometimes they don't. These emails are not duplicates; in the folders for each individual account, the emails are all displayed only once. I don't have this problem on my old computer—same Windows, same Thunderbird, looks exactly the same. Does anyone have any idea what might be causing this?