Forum communautaire Thunderbird

Thunderbird 147.0.1 (aarch64, macos, m2)

Team, After spending many many hours creating 14 search-folders that can find all of the right emails in approx. 20 "real" (local) folders.

Then I renamed 10 local folders and noticed my searchfolders disappearing!?

Big panic. Now, only the last 2 created searchfolders where there. The rest was gone. Realizing that the searchfolder config is in a file called "VirtualFolders.dat" I instantly took a copy. Restart Thunderbird: Now only 1 searchfolder was left. The copied virtualfolders.dat file still had 2 searchfolders in it but the rest is gone. There is no other copy/backup of this file.

These search folders are the only thing that generated some sense in gigantic piles of email.

Does renaming local folders KILL Virtual/Search folders?

Greetings.

For many years I have used Thunderbird to send and receive mail through my Outlook account (while happily donating to Mozilla).

A few months ago, every initial attempt to send a message abruptly started to fail, generating the dreaded notice that “the message could not be sent because the connection to Outgoing server (SMTP) smtp-mail.outlook.com timed out.”

What is odd is that if I keep trying to send, the message always goes out eventually -- sometimes after only two tries, sometimes after ten tries.

Thus, my Outlook account works, my Thunderbird settings work, the SMTP server works -- but only at random intervals.

The problem has continued through several Thunderbird updates, including the current one (147.0.1). I tried changing the server to smtp.office365.com and got the same performance.

I am on MacOS 15.4 and am not running any third-party antivirus or firewall product.

My thanks to anyone who has insight into this problem.

I inadvertently deleted a mail sub folder named Shopping Oder Confirmations I found the folder in my acronis backup and copied it to my desktop I then pasted it in to the profile window of thunderbird in hopes that when i restarted it would show up in my mail folders which it did not I can send you screen shots of the different windows where I dropped the folder Can you help please?! There is tons of information in these folders I reference often. Thank you! BTW I did just make a donation :)

I have Thunderbird 142-esr on a Windows 11 computer with two users in separate Windows users account. The second user (my wife) suddenly had her gmail login stop working on TB, even though it continued working on all other devices. The symptom was that the inbox would hang trying to log on to gmail, although no error messages appeared.

My account worked normally throughout this time.

After trying less destructive fixes such as closing the application, logging off, and restarting Windows, I guessed there was an issue with her account, possibly a corrupted file. So I deleted her gmail account. When I tried to create a new account, TB accepted her credentials and the Google login came up. I successfully authenticated to Google, but installation failed when I returned to the TB new account screen. After a long wait, TB issued an error message saying the password or user name was bad.

I did two tests to isolate the problem. First, I attempted to install my wife's gmail account in my Windows TB instance. That failed in the same way. Second, I attempted to install my gmail account on her Windows instance. That worked. I concluded there was nothing wrong with her instance of TB. I thought it might be an issue with her password, although Google has never asked her to change it, and there haven't been issues logging on outside of TB. Her password did not meet Google's current requirements, so I changed it to 12 characters, mixture of upper/lower case, numerals, and special characters. That worked.

Unfortunately, during the process, I lost her settings, and it took a while to recover them from backup media.

I'm posting this more to ask if others have experienced such a problem than as a request for help, as I think the underlying issue is now resolved. Because it may be some kind of malignant interaction between TB and gmail, I thought it might be worth reporting as well.

When in e-mail I get a message concerning not being able to connect I MAP settings as there are too many or something like that. (Message disapears quickly). It indicating that I should use advanced I MAP settings - all of which is way beyong my primative knowledge. Anyone throw any light on this regarding what and how to do or who to contact Thank you . Bernard

I have recently installed 140.7.1esr (64-bit) on Windows 11

1. It keeps asking for my account password, I always check the box for saving to the password manager, with no effect, I still have to type it in every single time. (I did set up pwd manager and I do have a master pwd)

2. Initially I had Thunderbird pick up my Gmail account as well, but it stopped picking up my Gmail for some reason. So I completely deleted my Gmail account in Thunderbird. yet it persistently asks for access to Gmail every 15 minutes. (I get a notification from Gmail saying that Tbird is asking for access to Gmail). The Gmail account no longer exists in Tbird, does not show up in the menu, and it does not download anything from Gmail if I give it permissions.

I am working on an article explaining aspects of message verification such as SPF, DKIM, DMARC and ARC. I have been studying how messages are marked as spam. I have observed that some messages that would be purely legit (like from my bank) are occasionally marked spam. Others show inconsistency -- such as my articles from Substack being marked as spam for some addresses I own, while others are not.

I am particularly interested in how Thunderbird is interpreting the header in regards to source verification. In most of my articles I have advocated for a scoring system that would better inform the recipient of the trustworthiness of the message. I noticed there is an X-spam tag on some messages that is based on a scoring algorithm.

Appreciate your assistance.

Eric

I have my calendar from mailbox.org synchronized with my thunderbird via CardDav/CalDav. I have multiple calendars in the same account (e.g. work, free time, brithdays, ...). I cannot change in which calendar an event is saved after I created it.

How to reproduce: Edit an allready existing event and change its calendar (e.g. from "free time" to my "work" calendar).

Expected behaviour: The edited event is now moved to the other calendar.

Observed behaviour: The event is not moved (any other changes to the event are saved though).

It is not the fault of my provider as it works on my phone and on their web app.

This is either a bug in any of two ways:

• It does not change calendars events but it should.
• You are not supposed to be able to change the calendar afterwards and that means the selection of the calendars should be grayed out/ give you no option to save it.

(I know I can Ctrl+X and Ctrl+V it into a diffferent calendar, which I use at moment but that costs additional time.)

Thanks for any help with this :)

PS: I have to choose a topic but the calendar is not even part of that list. What is going on there?

Hey, i have a question

i recently installed my computer new, now i pulled over my Thunderbird profile folder, i have 2 email accounts and like 30 feeds, now when i click on a feed it shows

"feedname - 623 messages"

NO MESSAGES

aka its empty, when i restart its fixed, and i never get a blue update mark aka he does pull new messages but does not inform me

any way to fix this? Thanks :)

Hallo, kürzlich habe ich einen neuen PC (Windows 11 - Androit) in Betrieb genommen. Seitdem gibt es immer wieder Schwierigkeiten beim Versenden meiner E-Mails. Ich werde ständig aufs Neue aufgefordert den Benutzernamen und das Passwort einzugeben. Wenn ich das tue, und das Gewünschte eingebe und absende, erscheint kurz danach die gleiche Aufforderung, das Gleiche könnte ich endlos wiederholen. Mein E-Mail wird dann aber trotzdem versandt. Was mache ich falsch und wie kann ich das ändern. Vielen Dank für Hilfe MfG Horst Kniepmeier

After initial set up of an email to sign in to that email is impossible with the error message "Something went wrong" The only help is sign in from another device. This is not helpful at all!

This is particularly difficult when trying to set up an email on on an email programme such as Mozilla Thunderbird. Not but a few months ago this was never a problem as I have used this for years with Yahoo emails with absolute no problem.

This has all changed now (January 2026) making it impossible to set up an email by not being able to sign in to the account on the yahoo pop up screen.

This being tried on Linux and Microsoft windows on numerous browsers.

On one Windows computer in your pop up sign on window it just keeps saying turn on cookies in your browser but the cookies ARE TURNED ON? So it is just ridiculous.

Using the Spell checker in long test the cursor gets behind the popup window of the Spell checker. I know this was _no_ problem in further vcersions. Please change it! So I have to close the window to find the caursor and restart the Spell checker

Neither plain-text nor HTML-signatures are being removed in replies, even though they are at the bottom of the email i'm replying to, prepended by the default -- tag on a dedicated line, as is the standard. I double checked that mail.strip_sig_on_reply is set to true. This happens on two separate accounts configured on my client. Thunderbird Version 140.6.0esr on Tuxedo OS (equivalent to Ubuntu 24.04)

Hello,

I love Thunderbird, but I have recently moved to use a Android device for most of my work, and despite that there is now Thunderbird for Android, I found that there is a feature I really need but it is not working there: moving mails across different accounts. I work daily with four different accounts and sometimes I need to move some threads from to another. I had to move to a different email reader because of that, but I would really love to come back to Thunderbird.

Best regards, Patricia.

I use a 32" monitor. In Thunderbird, I want to create some Message Filters. I bring up the Message Filter window and enter a filter. When I go to click the OK button to save the filter, I cannot see the button on the screen so I try to scroll the window via the scroll bars to find it but it won't scroll. I next try to shrink the window by using the CTRL key plus the mouse scroll wheel but nothing happens.

I cannot see any way to create and save Message Filters in Thunderbird unless the window can be reduced. Why does Thunderbird NOT use Windows facilities? I can generally shrink or expand a window by the Windows facility of CTRL + scroll wheel, but not so in Thunderbird.

I need some direction, please.

When I receive an event invite and I accept it Thunderbird only gives me the option to save the event to a local calendar and not to any shared calendars located remotely on a NAS. Is there a way to have Thunderbird also display the remote calendars? And after I accept an event is there a way to move the accepted event to a different calendar? Thank you for your inputs in advance!

How can I transfer total messages including date and addresses to a word document for layout and summarising. I used to do this perfectly well in Windows Live Mail for many years!!!!

My mom has been using thunderbird since 2015 like me on a debian based linux distro. I upgraded her PC lately. I double backed her .thunderbird account by copying her .thunderbird folder and using export to an external drive. It took an unusually long time to do this. Her email account is setup to use smtp but she has >1GByte size mapi folder. After getting the new PC up and running, only the smtp email is showing up. How can I access the email in her mapi folder?