Thunderbird Community Forum

I have been using maildir as the message storage format for six months. I have known that the implementation is not complete and that there are several known bugs, so using it is risky.

My reports that I have not experienced any problems may have encouraged other people to use maildir, so now I must report a problem.

Twice recently, my IMAP inbox did not show all messages. Repairing the folder worked the first time. The second time, repairing the folder causes all messages in the folder to disappear. Worse, it seems that it deleted the inbox file in the file system.

I do not know if this data loss was due to maildir. It may have been.

I have returned to using mbox.

I am no longer getting emails on Thunderbird on my computer though I do get them e.g. on my iPad, and I can email out. Is that a problem with Thunderbird or with Bell my service provider?

Hello all After a Thunderbird update, a folder named "thunderbird" was created in my Personal folder. This folder is empty. After deleting the folder, it is recreated when Thunderbird is restarted. How do I get rid of this folder? Alternatively, what does this folder contain, and how can I move it to a different location?

thanks Thomas

Thunderbird 148+ on Windows 11 repeatedly prompts for the password when synchronizing an Exchange account (professional) configured with the native Exchange support (no add-on installed).

The account only offers “NTLM” or “Normal password” authentication methods. OAuth2 is not available in the account settings.

During synchronization, Thunderbird asks for the password separately for many folders. However, clicking “Retry” usually works immediately without changing the password, and manually re-entering the same password also works.

The issue then reappears for the next folder, causing continuous authentication prompts (I have many folders...).

Actions already tested:

• deleting saved passwords and tokens,
• deleting/renaming key4.db and logins.json,
• restarting Thunderbird,
• recreating the account.

The problem persists.

This looks like an authentication/session handling issue rather than an actual invalid password.

The last new email I've received on Thunderbird for one of my accounts was on 5/13/2026 at 12:02 p.m. Every time I open thunderbird it tries to re-download the entire yahoomail account and times out. I have deleted all emails from the yahoo mail box from 5/13 and backwards. All spam emails have been deleted and the trash can has been emptied. Per online instructions I have also deleted the popstate.dat file, tried to repair the inbox file by right clicking on it, going to properties and clicking repair folder. I also tried to compact the folders, and have turned off my virus protection and nothing seems to be working. I also tried a new app generated password from yahoo. Current setup is pop.mail.yahoo.com port 995 SSL/TLS, authentication method = normal password. Any help would be greatly appreciated. Thank you!

Comcast has sent our accounts to yahoo. Email name remains the same. I wish to continue with Thunderbird. I haven't been able to and don't want to lose all my Thunderbird settings and files. They have been transferred to yahoo mail.

I had to turn off Norton VPN to use Thunderbird as my email client for the Comcast email service. Is there any strategy to allow Thunderbird to work through a VPN? I use the POP protocol and keep all saved messages (hundreds) on my PC, not on the email server.

Have not been able to receive email on my primary account (I have 3 accounts) for 3 days now. Windstream has been no help and seems to have lost hundreds of important files. My 2 other accounts work fine. HELP!

Thanks in advance. I'm trying to get Thunderbird setup with an outlook.com email address. All the default server settings look fine. I know the email address is good since I can login via a web browser. Cookies enabled and all the other recommended settings including app password. Yet it keeps saying Unable to log into the server. Has anyone successfully done this with the latest version of Thunderbird. I'm on Zorin 18 Pro.

Regards,

Mark Verhyden

Здравствуйте!

Пытаюсь подключить Яндекс.Почту к Thunderbird, чтобы скачать письма с Яндекса на компьютер.

Проблема такая: при добавлении аккаунта Яндекс.Почты в Thunderbird меня почему-то перебрасывает на авторизацию Google. Возможно, это связано с тем, что ранее почта была мигрирована на Google-аккаунт с таким же адресом и доменом, либо ящик Яндекса сейчас неактивен (он не оплачен, там просто старые письма лежат) — точно не понимаю.

Подскажите, пожалуйста:

Почему при подключении Яндекс.Почты Thunderbird может открывать Google-авторизацию? Можно ли принудительно подключить Яндекс.Почту вручную? Если ящик Яндекса был ранее связан/мигрирован с Google, есть ли способ всё равно скачать письма именно с Яндекса?

Моя цель — получить локальный архив писем с Яндекс.Почты на компьютере. Буду благодарна за пошаговую инструкцию, что проверить и как правильно настроить подключение.

With previous computer (Winidows 11) I've been able to send an email from WITHIN Word, but now I get error message "Word couldn't send mail because of MAPI failure." Any idea how I can fix this? Regards, David, running TBird version 151.0.1 (64-bit)

I have an account with a Spectrum tx.rr.com address. I use Thunderbird to view and send. The email account is set up as POP3 in Thunderbird. It has worked well until the last couple weeks when I started getting sporadic errors from Thunderbird saying "could not connect to server mail.twc.com; the connection was refused." then a few minutes later it works. Sometimes this happens on the Send and sometimes on the Receive.. I believe the account is set up correctly and I never have an issue through webmail. This can happen 5-10 times/day. It is annoying. Any suggestions on how to fix?

Hello, I have the latest version of Thunderbird. I have a problem for 2 weeks and every day I'm working to solve this problem. I have 17 accounts and Thunderbird shows me only 15 accounts. It hides 2 yahoo accounts. If I add other not yahoo account, there are no problems, I can add them. But if I add a yaoo account, Thunderbird doesn't show it/them on Unified folders. I see them only on All folders. Thanks for your help.

Hi everyone!

I'm trying to log into my email account on the domain example.com via SMTP. The email account is with yandex.ru. When I try to authenticate, it says the SMTP password is incorrect. I decided to try through Outlook, and it worked. What could be the issue?

Tried mail.twc.com and it just sends me back to Spectrum. I can get my mail on Spectrum but not my Thunderbird icon. Doesn't work on our iphones either.

I have 4 gmail accounts in Thunderbird. The calendar shows items from all 4 accounts. My issue comes when setting up an invitation. Pretend my accounts are:

personal1@gmail.com personal2@gmail.com personal3@gmail.com business1@gmail.com

If I want to set up a meeting with invitations from business1@gmail.com, I select the account from the left side of the calendar list, then I create a new event on the day I want. The dialogue box correctly shows "business1@gmail.com in the Calendar drop down box at the top. I can then fill in title, location, category, time etc. But when I click on Invite Attendees, thunderbird has already added "personal1@gmail.com" as the first attendee and is waiting for me to enter the contact of the second attendee. If I add people and send it out, it goes from my "personal1" account and not my "business1" account and any replies come into "persoanl1". Same thing happens if I start by selecting the "personal2" or "personal3" accounts first in Calendar view. It always sets "personal1" as the organizer.

I can not figure out why Thunderbird is automatically using "personal1" as a default and sending from there. I am adding a screen shot to show what it looks like after adding an invitee.

Desktop Thunderbird no longer downloads mail from Yahoo though it did until 2 weeks ago or so. Now when checking for mail, I only see a "Local Folders: Checking Inbox for new messages" (screenshot) that eventually disappears after a while with no download. I can still send messages out from Thunderbird through Yahoo. I have done the "Please check the following before asking for support" : 1. I can log into my Yahoo account via the web and am using the same password 2. I only have one Yahoo account; all the other accounts work fine 3. I can send mail from Thunderbird through my Yahoo account with no problem 4. OAuth2 is active and can successfully establish a secure connection (screenshot) 5. Cookies are enabled with no exceptions (screen shot) 6. I do not use a VPN 7. Version is 151.0 (screenshot) 8. I checked the Error Console messages when Checking Inbox was active (screenshot) but do not understand it

I blocked out information on non-Yahoo accounts and email subjects on screen shots

Once in a while, when I download email, Tbird fails accessing outlook.com. The message is in the attached image. If I redownload, it works. Any Ideas? P.S. this has happened with several versions of Tbird... Thanks.