Thunderbird Community Forum

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

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!

the thunderbird on the old laptop still showes all emails back until 2022. after copying the profil to the new laptop as described on the mozilla video, thunderbird took all settings but at one of the email accounts it just showes emails back to may 2026. The rest has disappeared. I tried all fixing experiences I found on internet but it doesn´t work. This special Email account had the pop3 - setting.

I recently upgraded to version 115.10.1 and it is driving me utterly insane. It repeatedly turns on threading. I turn it off for a folder, next time I log in it's on again. I turn it off in a folder and copy that setting to all other folders, but it turns itself on again. Others say turn it off in Settings/Appearance. But I don't seem to have Settings/Appearance.

How do I stop this? Or is there a way to find out what version I was originally running and go back to that. I hadn't upgraded for a good while but my old version was much better. This one is also really slow and I hate the tiny text.

Thunderbird Calendar cannot select custom sound for reminder. The browse button to select custom sound does not work.

Same issue was brought up by someone else 3 years ago here: https://support.mozilla.org/bm/questions/1414126

The provided solution which worked for the user (on TB 102):

Settings/General, Config. editor, paste mail.biff.play_sound.url in the search, then click the Reset icon for that preference, then see if the Browse button works.

This no longer works on TB 152.01, so cant use longer duration custom sound. The default sound is a micro-second blip that is easy to miss.

Hope to find solution. Thanks!

when I delete a folder which is showing in a light color, message states folder is undouble. I delete it but it re appears when I log back in. How can I permanently delete the folder?

Dear Sir or Madam,

I have lost all stored folders with my email correspondence from the Local Folders for an unknown reason (I restarted my computer, and they disappeared). I can find some of these emails using the search option, but I cannot see the path of their storage location. I have checked my Profile/Mail/Local Folders, but they are not there. Are they stored on the server? How can I recover these folders?

Thank you very much in advance,

Jasmina

Thunderbird 152.0.1 Windows 11 Pro 10.0.26200 Build 26200

When I create a new e-mail or reply to one that I have received I am able to type in all fields, but there is no "Send" button to the left of the "From", "To", and "Subject" fields.

I can work around this by clicking "File...Send Now", but that is very inconvenient when I am sending many e-mails.

I use Thunderbird to access my Gmail accounts. Gmail is confirgured for IMAP and I am able to access all of my E-mail accounts ... so that is good.

However, I do have one issue: When I delete an E-mail in Thunderbird, it moves to the TRASH folder and I empty that daily. However, when I go to Gmail, I can see that they are STILL in "All Mail". If I access All Mail in Thunderbird and delete messages, they reappear.

The only way I am able to get rid of them for good is to access them in Gmail. If I don;t, the All MAil folders grow like crazy and messages thgat I deleted are still there .. some were several years old.

Question: Is there a way to set up Thunderbird so that when an E-mail is deleted in Thunderbird, that it takes it out of "All Mail"?

The system was working fine. The next day, when starting Thunderbird (TB, the status line shows logging in to server but loops; no errors or messages, Thunderbird is 'locked out' spinning. I see the normal INBOX page, but logging in never completes. NO CHANGES were made to TB accounts or settings. I have re-installed TB, re-booted, but no change. I cannot check/change any of the accounts or do any further 'debugging' because TB is spinning. The server login is fine because Webmail can be used. Internet connection is fine, because browser works. 1. How can I stop TB from trying to login at start up? 2. What could/would cause this behaviour?

Any suggestions much appreciated.

Hello everyone,

I am hoping someone can help me recover some EXTREMELY important emails for a legal matter. I was trying to export an entire nested Gmail label (WORK/TNC/TNC DISPUTE) to PDF.

It's a lot of emails spanning from April 2024 that I had painstakingly been going through and labeling to get them ready to print to use as evidence for a work dispute. When faced with the task of having to print all those emails to pdf, one by one, I wanted to chew my own arm off!

I'm convinced there must be another way to bulk print to pdf......and so I went down a few rabbit holes in search of my quick fix.....(I'm not trying to be lazy, I just have very little time left to get this done, and right now I'm losing the will to live if my reality is that I will be busy with this till the end of time.)

I read different threads and questions over the internet and found information that led me to Thunderbird. (Hi, Thunderbird :). I know there are paid apps or extensions that can bulk print to pdf, but I unfortunately don't have the money to pay for them (i.e. the work dispute - salary has been frozen for over 2 years and resignation was denied, so no income and held hostage by my employer - the emails I have lost are literally my future!). Sorry, enough of the why.....

I DID THIS:

So I read that I need to to create a folder in Thunderbird's "Local Folders" with the same name, and simply drag and drop the label from the original label to the local folder label (I did all of this in Thunderbird.

Unfortunately, this went VERY wrong. At first it seemed like it was doing something, but it didn't really do anything that I am aware of.....There was nothing in the local folder I had created and dragged the label to, there was nothing in the original label folder (everything was empty). I died! Then comforted myself with the fact that it's still in GMAIL.....that was the naive, optimistic me talking..... Headed over to Gmail, saw my label name, sigh of relief, clicked on the label name.....DIED 10000000000000 x over.......I continued to cry for the next 4 hours...

.That was the 12th of June.....I'm still trying to get them back.....I have been able to find a few bits of info here and there.....I just don't know how to get them back into Gmail for me to never try be so foolish again!!! (Until someone maybe shows me how to bulk print to PDF?????)....

Here is the current situation and the technical details of what I've found so far:

What happened:

Thunderbird executed a "Move" command instead of a "Copy".

The TNC DISPUTE label is in my Gmail web interface (the emails are not in the label, nor the the Trash and none of my settings anywhere are set to delete permanently etc., on exit).

The Local Folder in Thunderbird shows up on my screen, but it is completely empty.

What I have discovered in the background:

Account Type: IMAP connected to Gmail (*********@gmail.com). (i've replaced my email address name with stars to not put my private email on a public site)

The Local Files: I found the tracking path imap://**********%40gmail.com@imap.gmail.com/WORK/TNC/TNC DISPUTE. I also found the raw file directories containing TNC DISPUTE (no extension) and the TNC DISPUTE.msf index file.

The roadblock I am hitting:

I read that deleting the corrupted .msf index file while Thunderbird is closed will force it to rebuild the index and potentially reveal the emails. However, at first I couldn't safely get into the folder to do this:

When I clicked "Open Folder" from Help > More Troubleshooting Information, Windows threw an error: "Explorer.EXE - There was a problem sending the command to the program."

When I try to bypassed Thunderbird and use the Windows Run dialog with %appdata%\Thunderbird\Profiles, Windows threw another path error and refused to open it.

I ended up reinstalling Thunderbird and it fixed the access profile issue and I can now access where the data gets saved from Thunderbird.....

I just don't know what to do from here to get my (previously local foldered misshaped moved) folder back in my Gmail. (safely - to not corrupt everything or worse....delete it permanently.....)

The details of the missing emails (contents of the label that did copy to the local drive I think):

Directory Contents (as shown in the attached image)

1. TNC DISPUTE.sbd

• Type: File folder

• Date modified: 19 Jun 2026, 00:55

2. msgFilterRules.dat

• Type: DAT file

• Date modified: 12 Jun 2026, 05:49

• Size: 0 KB

3. TNC DISPUTE

• Type: File

• Date modified: 19 Jun 2026, 05:55

• Size: 670,605 KB

4. TNC DISPUTE.msf

• Type: MSF file

• Date modified: 12 Jun 2026, 22:31

• Size: 3 KB

5. Trash

• Type: File

• Date modified: 12 Jun 2026, 05:48

• Size: 0 KB

6. Trash.msf

• Type: MSF file

• Date modified: 12 Jun 2026, 06:27

• Size: 2 KB

7. Unsent Messages

• Type: File

• Date modified: 12 Jun 2026, 05:48

• Size: 0 KB

8. Unsent Messages.msf

• Type: MSF file

• Date modified: 12 Jun 2026, 06:24

• Size: 2 KB

Sorry for the long post, hopefully someone can help me go back in time and have my only issue be searching for ways to bulk print to pdf and not having to try restore the only emails that are actually worth being on there.

TIA xxx Margz

I believe someone got a hold of my email please help recover my account. It keeps crashing in not backing up. Thanks to who it my concern I'm losing a lot of data.

Quick Filter does not return correct results in Unified Inbox (Thunderbird 140.12.0 ESR)

I'm using Thunderbird **140.12.0 ESR (aarch64)** and believe I've found an issue with the Quick Filter when searching the **Unified Inbox**.

• • Steps to reproduce:**

1. Open the **Unified Inbox**. 2. Open the Quick Filter bar. 3. Enter a search term (e.g. "maddy").

• • Observed behaviour in the Unified Inbox:**

• With no "Filter messages by" options selected, entering a search term does not filter the message list.
• Selecting **Sender**, **Recipients** and **Subject** still does not return the expected email.
• Selecting **Body** changes the results after a delay, but the expected email is still **not** returned.

If I open the **actual Inbox** containing that same email and repeat the search:

• The expected email is found using **Sender**, **Recipients** and **Subject**.
• When **Body** is selected, the search takes longer and eventually returns additional matching messages, including the expected email.

This behaviour is reproducible with multiple search terms and suggests that the Quick Filter does not search the **Unified Inbox (virtual folder)** correctly, even though the same search works in the underlying physical folder.

Could you please confirm whether this is a known issue or a bug?

After I open my Thunderbird email and use it for 15 to 20 minutes it freezes. I need to close it and I get a message Thunderbird is not responding. I then need to close the program using Microsoft to close the program.

I have been using the same Email Address and Thunderbird for Downloading my Emails for over 10 years. Now Thunderbird will Not Install. Am getting a strange Error Message ... Authentication Error : Unable To Log in at Server. This has happened on 3 machines. Why is it now impossible to Install Thunderbird on Windows 10 machines.

My LongTime Email Address is [edited from public] @Juno.com

Is there any way to communicate with Mozilla ThunderBird  ? It worked for over 10 years, but now won't even Install. Has there been some sort of Sabotage ? Why the strange error messages  ? Continous mandates to change usernames and passwords ?

Welcome to Thunderbird – Enter Your Email Account Password :

       -------------------------------------------------------

Authentication Error : Unable To Log in at Server. Probably Wrong Configuration, UserName, or PassWord.

Email is [edited] @Juno.com Present TextMail is [edited]

/edited email and phone# from public community support forum