Thunderbird Community Forum

On my Linux machine, I exported the public key for an email address in Thunderbird 140.8.0esr (64-bit) into a file. I transferred the file to my Windows 11 machine via Warpinator.

On the Windows machine I am running Thunderbird 148.0.1 (64-bit). In Account settings>End-to-End encryption, I click Add Key>Import an existing OpenPGP key>Select File to import, and then I select the file.

I get an error message: Error! Failed to import file.

I'm surprised. I would think that going from one installation of Thunderbird to another would work this way. I am concerned that I won't be able to read incoming encrypted emails without the key working.

Can someone help me?

A few days ago I lost all of my saved email messages, plus "sent" emails, and "deleted" emails. I had important information stored there for future use. I am hoping to be able to retrieve it. Any help would be appreciated. Thank you!

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both the automatic and the manual configurations failed. The new account receives mail, but the outgoing smtp server config seems to have a problem. Sending messages times out or keeps prompting for a new password.

The Hotmail account has POP3 and IMAP enabled. Thunderbird is set to receive all cookies. I cleared history and cache after every attempt and also temporarily disabled the firewall.

Any suggestions about what the problem could be?

Dear Support Team,

I am writing to report an issue I am experiencing with Thunderbird. Every time I use Thunderbird, an attached error message keeps appearing. This problem is delaying my work and affecting my daily tasks.

I kindly request your assistance in checking and resolving this issue as soon as possible. Please let me know if you need any additional information or screenshots of the error message.

Your prompt support would be greatly appreciated.

Thank you

I get this error ALL THE TIME from TB. Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp-mail.outlook.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. Copilot says that TB is NOT recognizing my personal Outlook email account as a viable SMTP account. Been on line with Copilot for couple of hours without success. Does anyone at Mozilla have anything to offer me?

I have several emails (personal and business) that I use and have them grouped in Unified inbox. Recently one of those emails showed up as a new folder (just under Trash folder) in bold type. It has with a varying number of emails in it, now 18. When I click on the 'open folder arrow', a subfolder 'Archives' with nothing in it shows up. When I open the email folder a new page appears with the email as a header and underneath 'set up another account', 'import from another program', 'about mozilla thunderbird', and 'resources'. What is happening? How can I get rid of this folder since I can't read any of the emails in it and it is just a duplicate of the folder that already is working find in the inbox? TIA

I use apple mail on my phone and Thunderbird on my PC and my (IMAP) email provider is GMX. I recently added a couple of sub-folders to an existing folder and changed the names of couple of others (in the same main folder). I did those changes on my phone. However, those changes are not reflected on my PC. The folders with changed names are in the folder list but greyed out but the new folders are missing. If I click on a greyed out folder it is empty. I've tried several ways to force the list to update but, so far have been unsuccessful.

What is causing my problem and how can I fix it?

Thanks for any advice.

Thunderbird has stopped receiving messages from @embarqmail (Sept/25) and @gmail (Mar/26) stating the password is incorrect. The passwords are correct as I can still access these accounts online. I have repeatedly updated the passwords through the popup message, but my emails are still not delivered or sent. Lucille

Hello, so I have Thunderbird installed on 2 Windows 11 PC's both are updated and operating with all updates! On my 1st (main) PC which I use 98% of the time Thunderbird has been running perfectly with IMAP and Oath2.

Last night on the 2nd PC I rarely use I opened Thunderbird and it started to download messages for awhile and all my 2026 up until OCT 2025 disappeared?

I logged into Yahoo Mail from a browser and yup all gone?

I sent a deleted by accident request to YAHOO and today all my mail had returned when I checked on my 1st (main) PC.

I started the 2nd PC and all was good, till it started downloaded messages again? And POOF right back to square one?

What's happening? Should I confirm that IMAP and OATH2 are enabled on that PC before I do something else? I've sent another DELETED request to Yahoo and at this point I'm thinking to just REMOVE Thunderbird all together on the 2nd PC.

I have some more email accounts with Hotmail and Outlook but there is popping an error just after the popup where it asks for permissions to connect Thunderbird to my account, and I say Yes and also receive the email that some new apps have connected to my accounts, but Thunderbird just at that step instead of Finish it displays that error message like asking again for Username and Password and even if I fill there the correct details it doesn't go further. Something is unclear at that step, because I also tried removing the passkey from the respective account Page at outlook.com and also the 2FA but the same.

Can you help me?

Thanks

Mam problem, pierwsze parę kont dodanych do Thunderbird działa poprawnie i nie ma z nimi problemu. Natomiast pojawił się problem z kolejymi pocztami -nie widzę na nich połowy folderów, albo w sumie żadnych, ani wiadomości wysłanych, ani roboczych. Znowu na innej poczcie w odebranych, nie widzę nadawców - tylko własnego maila. Próbowałam na nowo zainstalować te poczty, jednak nie przynosi to zamierzonych efektów, albo wręcz jest jeszcze gorzej.

no matter what i enter in settings, any time i minimize thunderbird in win 11 to tray, and then click on its tray icon to reopen it, it opens at this odd sizing every time. i always put it fullscreen again, and minimize, then go to open it again, and there it is, at the odd size again. no other program does this in my two machines. just thunderbird, and i have never set this size and placement, it just seems 'forced' every time, making me have to resize it every time i open it from tray.

I want to send photographs from my Android phone to the "pictures" section of the Thunderbird e-mail program. The photos are going into that section but I can't see the picture itself as they just show wording as extensions. How do I get the actual picture to show up? How do I put my desired description of each of the "pictures" on the list along with the extension wording?

After updating Thunderbird to version 148.0 (64-bit), my system crashed. I rebooted and tried updating again. I am now sending and receiving emails normally from only one of my three AOL email addresses. I have attempted to reconfigure the settings on the other two manually, to no avail. Can the settings be corrected automatically? Please direct me to helpful guidelines that I could follow. Thank you.

I have a Windows 11 operating system. I tried browsing/uploading a couple email messages describing providing more information but wasn't successful. Can you help me ?

I subscribe to a number of RSS feeds in TB. This works well nearly all of the time but sometimes I find that TB has paused updates. I never want it to do this.

Why does it happen and is there a way to stop it doing it?

bold text I have tried restoring my system to a previous date. I did receive those Emails. Today, I've not received my Email messages. I have tried you help resources and have been able to get Thunderbird to run as before. I would appreciate any assistance that you could give a seventy-six year old user.

TB on Windows

Prior to TB 148, OAUTH worked for POP3 access to: Gmail, MS Outlook, and Yahoo.

After TB 148 upgrade: OAUTH to Yahoo fails, subsequent log-in page also fails. Both OAUTH to Gmail and OAUTH to MS Outlook still work fine.

Rolled-back/Reverted to TB 147.0.2 -- OAUTH to all works fine, as it did previously.

Note: YahooMail seems to have other problems. But I was able to confirm successful OAUTH and POP3 to YahooMail after reversion to 147.0.2.

I configured a series of "Filters" on my account inbox (imap), that move certain messages into specific (sub)folders. E.g. "To: certain@address.de" , filter applied when fetching messages "before junk detection" (German UI: "Filter anwenden bei: Nachrichtenabruf").

The filter seems to just silently fail and do nothing, since I also use my Android K9-Thunderbird app (imap) on the go.

How can I get my Thunderbird desktop filter to work again, even when imap fetching/accessing new messages with the phone?

Thank you for your informed insights

Update: screenshot of filter added (de)