Thunderbird Community Forum

I recently installed Thunderbird for use with Gmail. I have created several message filters, but they keep disappearing. I have found that multiple filter files have been created:

Directory of C:\Users\shrdl\AppData\Roaming\Thunderbird\Profiles\ae352sn6.default-esr\ImapMail\imap.gmail.com 2025-10-28 22:30 385 msgFilterRules.dat

              1 File(s)            385 bytes

Directory of C:\Users\shrdl\AppData\Roaming\Thunderbird\Profiles\ae352sn6.default-esr\Mail\Local Folders 2025-10-28 19:07 241 msgFilterRules.dat

              1 File(s)            241 bytes

Directory of C:\Users\shrdl\AppData\Roaming\Thunderbird\Profiles\ae352sn6.default-esr\Mail\pop.gmail.com 2025-10-26 11:03 0 msgFilterRules.dat

              1 File(s)              0 bytes

Any idea why this is happening? Thanks

I keep getting an alert saying I need to update my email account. How do I do that? (BOTH of my email accounts work fine on my home computer, but neither works on my classroom computer. I'm a teacher).

I'm trying to install Thunderbird on a Mac Studio with OS Sequoia 15.3. In the first step I'm asked for my user name, email address, and password. When I hit the [Continue] button the install crashes and issues a crash report. Is there a compatibility issue at play here? Is there an alternative method of installation?

I am trying to install Thunderbird on a computer with windows 10 pro but install gives a message cannot install require a minimum of windows 10 but I do have that. what can I do please. Regards Neil.

This is a new Fedora-42 desktop, upgraded (dnf upgrade) today. I installed Thunderbird today (dnf install thunderbird), after doing the operating system upgrade. I tried to add my yahoo e-mail account. Settings are as follows:

• create accounts in the new Account Hub is unchecked (off).
• accept cookies from sites is checked (on).
• remember password is checked (on).
• I'm using "IMAP".

When I click "Done", a separate window pops up in which yahoo asks for my password. After entering it, yahoo says "Something went wrong", and gives no other indication of what the problem is.

If I instead "Configure manually"... I tried both the default hostnames and "export.imap.mail.yahoo.com" for the outgoing server. I tried both "Normal Password" and "OAuth2" authentication methods.

In all the above cases, I get "Unable to log in at server. Probably wrong configuration , username or password." with a yellow background.

I see nothing of "Edge Too many requests" as was happening to several people recently.

How do I add my yahoo account to this new Thunderbird on Fedora-42?

Hello I have Thunderbird on my Laptop. When I try to install it on my PC I got the message: server not found. I use the same parameters than the ones on my laptop. Can I synchronize these parameters on my PC? Regards Gabriel

To be clear, I seriously doubt the problems I am encountering are TB's fault! The problems may be my fault since I've grown older, I've tended (believed) using new versions of software present my mind a BIGGER challenge than using the older software/version I have been successfully using? I'm still using Version115.10.1

After our ISP chose to start using Zimbra Oct. 7, 2025 and their tech support could not assist me in getting TB working the had me remove POP3 settings for TB and change to IMAP with their software.

FINALLY someone helped me get TB working with IMAP. For 3 days grrr. Now the ISP says I need to use their web mail, Zimbra.

So might downloading the current TB version and somehow get the In box, all the folder contnets etc. over - into the new TB help?

I was going to backup everything tonight, now I have little to NO hope, without help!

THANKS & remain WELL plus be SAFE!

Robin

I was trying to change the time emails are kept on the server so I went into "Account Settings" and now Thunderbird is locked onto this page. I get a "Mozilla Thunderbird not responding" message when I try and click on anything and I can't get out of this page nor access my Inbox. I've tried starting Thunderbird in Safe Mode which didn't work. I then uninstalled and reinstalled the latest version of Thunderbird but when it starts it goes straight back to the frozen "Account Settings" page. I've checked my profile and there is a new profile that was created with today's date. There is also a profile from June 2025. If the old profile contains all my emails and folders up to yesterday, that would be OK.

I backed up Thunderbird and reloaded it after I had been hacked in gmail, but now I have 2 profiles accessing the same gmail. One shows the gmail address and the other is my old "local" profile. The old one has my typical 16000 emails, while the new one shows 30,000 emails with no doubles. Can I delete the new one?

Running : Win 10 Vs: 145 I have many archive annual folders for a number of email accounts. I tried to archive messages today and nothing happens. Should a new annual folder be created for the group of messages I select, or do I have to manually create the folder?

My archive location is setup in the account settings and I've used it many times in the past. What am I missing?

My e-mail provider has done the annual update of security and provided a new e-mail cert; however, Thunderbird no longer successfully updates it.

Thunderbid gets to the point of confirming the security exception; however, does not proceed.

This is using ThunderBird 140.4.0esr (64-bit) from Ubuntu Snap, on Ubuntu LTS 24.04.3.

On Monday, 17 November 2025 the Security Certificate expired and I stopped receiving emails both on my computer and Andriod Device. As a result I am not receiving any emails through Thunderbird, but I can go to email host site to view them.

I logged in my computer tonight and clicked here and clicked there and the error message: "The certificate for mail.homebizmall.net is not valid for that server. Someone could be trying to impersonate the server. Create an exception but this could mean that someone has stolen your certificate and may be able to impersonate you."

So it seems the POP server and the SMTP server certificates were only valid for 3 months and I was FORCED to create the exception for both servers. Now I am worried the security has been breached.

By clicking here and clicking there, I stumbled on a few people who seem to have this problem, but each with their own limitations. My operating System is Windows 10 without the option to upgrade. I have not extended the security updates because I don't understand if it is just the operating system uploading to the cloud or everything on my computer and I am not prepared to do the latter.

Is it safe to leave the band aid on that I have used for the moment? Can I create an exception for the phone? Or is there a glitch that someone needs to walk me through fixing?

Thanking you in advance

Clinton

Hi. Ubuntu Unity 24.04 Thunderbird 140.5

When creating a New Message, the top 5 lines are missing - i.e the “End: (U)” (end time) line is displayed at the top of the screen. The only way to enter the Title of the Event is to drag the window down. Also, the Event window CANNOT be resized. This has been happening for more than a year now. Can you help? Thanks, M...

Hi everyone,

I'm trying to add my school email address to Thunderbird, but I keep getting a "Unable to log in at server. Probably wrong configuration, username, or password." error. I know that the username is right, and for the password, I've tried using the right password vs. leaving that field blank. For the configuration, I don't know if that's right.

The auto-configuration finds a configuration in the Mozilla ISP database, but that configuration leads me to the aforementioned error message. If the configuration is wrong, how would I go about finding the right information?

Alternatively, might it be the case that my school (the organization) has disabled using Thunderbird for our email. For any help looking into this, it's a @berkeley.edu address.

Thank you for your help!

when starting a new calendar entry, this may look like this: textline one

  textline two (three spaces at begin)
  textline three (6 spaces at begin)

     textline with tab right

     * Bulleted list itemtextline with bullet point

end of testtext

After closing the edit, the text looks like this: textline one textline two (three spaces at begin) textline three (6 spaces at begin)

textline with tab right

textline with bullet point

end of testtext

However, the edits on my phone, as shown in the image, show that the text structure commands are still there (except bullet point got lost).

So here is my question: how can I get the calendar entries show the obviously maintained text structure?

Hey,

I am seeing the creation of a file "logins.db" when opening thunderbird.

When I open the file with textedit, it begins with "SQLite format 3". It looks like a script to me, including things like "ON loginsL (is_deleted, origin)" and "idx_loginsM_is_overridden_origin".

I can delete and it's recreated when launching Thunderbird.

Is this file legit? Can anyone confirm having this file, too? I'm running Mac OS 15.7.1 with Thunderbird 145.

Thanks for listening

Hello! I have a question regarding Thunderbird version 144.0.1.

The server is configured locally and isolated from the Internet. There is an issue: when the network cable is unplugged (no network connection), saving received emails with attachments (for example, total file size of 14 MB) to the hard drive happens quickly — about 5 seconds. However, as soon as the PC is connected to the local network, the saving process for such attachments slows down significantly — up to 60 seconds.

I would appreciate your help with analyzing this issue and possible solutions. What could be the cause of this behavior?

Thank you!