Forum zgromaźeństwa Thunderbird

After installing thunderbird, It takes me hours to figure out that my fonts are too small because of one value in Settings > General > Language & Fonts > Fonts > Advanced > Fonts for Other writing systems gives a too small number.

It seems insane and I don't think users can easily get there. Maybe some users want to set different fonts for different languages and the "Fonts for ..." is for them. However, for most users who just want to change their font size, I don't think it's a good experience to going so deep and find an option in the loooong "Fonts for ..." list.

So please give users a simple option where I can just set my font size without such pain.

I know there's a font size option in TB menu but it doesn't work as expected. In my case, the font size shown in TB menu is 16 while the font size of my plain text emails is 12. And 1. email font sizes will change to TB menu size as long as TB menu font size is not 16. For example, when changing TB menu font size 15 -> 16 -> 17, email text just suddenly goes from 15 to as small as 12, and then from 12 to 17. 2. email font size seems changing with the TB menu font size. However, email text font size will go back to what it was when open another email.

I had an account gmail in thunderbird I lost it because I had to change the password and did not find to change it in thunderbird. I want to add this account in thinderbird but did not succeed. Can you tell me all what to do, I had always a window of Google that open but I do not understand what to do with it.

I'm trying to set up my thunderbird client (Version 147.0) to work with my Google Workspace. I understand that I should choose OAuth as the login method. The problem is that the option is not available when I try to create the account. There are only "normal password", "Encrypted password", "Kerberos/GSSAIP", "NTML" and "TLS certificate". What am I doing wrong?

Good Afternoon Theres 2 accounts under the same username.One is working fine and the other one displays the error notification "Failed to connect to server mackie. when I press on inbox. What confuses me is that it has the same names but has different folders underneath it.I need the one that displays the error messages to be fixed.

I am experiencing persistent issues configuring a custom-domain email account in Mozilla Thunderbird, while the same account works correctly in Outlook and in webmail.

Environment:

Email client: Mozilla Thunderbird (latest version)

OS: Windows

Mail hosting: Antagonist / DirectAdmin (shared hosting)

Domain: s23k.com

Email address: jean-paul.sablerolle@s23k.com

Incoming mail (POP):

Server: mail.s23k.com

Port: 995

Security: SSL/TLS

Authentication: normal password POP connection works without errors.

Outgoing mail (SMTP):

Server: mail.s23k.com

Ports tested: 465 (SSL/TLS), 587 (STARTTLS)

Thunderbird fails to send mail with the error:

“The requested domain name does not match the server’s certificate.”

Even after explicitly adding and permanently accepting the certificate exception, Thunderbird continues to reject the connection.

Important observations:

Webmail (Roundcube) can send mail successfully.

Microsoft Outlook can send mail successfully using the same SMTP server.

Thunderbird never completes SMTP authentication because the TLS handshake fails on hostname validation.

The certificate presented by the server appears to be issued for a different hostname than mail.s23k.com.

As a workaround, I am currently using an external SMTP server (KPN: smtp.kpnmail.nl), which works correctly in Thunderbird.

Question: Is Thunderbird intentionally stricter than Outlook regarding TLS hostname validation for SMTP, and is there any supported way to:

properly override this hostname mismatch for SMTP, or

diagnose whether this behavior is expected and unavoidable with misconfigured server certificates?

I would like to confirm whether this is expected Thunderbird behavior or if there is a configuration option I may have missed.

I am not trying to weaken security; I want to understand whether Thunderbird allows any safe override in this scenario or if the server configuration is fundamentally incompatible.

When I am working from home, on my home network, and using a VPN, (Windows 11) whenever I receive new messages, the app becomes completely frozen. That is, if the app is in the background and I receive an email "bing bong" notification, I can go to the app, but I can not click on anything. Nothing responds. I cannot change tabs, select a message, move the window, or even use the close box to quit the application. I must force quit via the Windows tray icon. If I open the application and it immediately checks for messages and gets new messages, also I can not interact with any on-screen window or element. I must force quit. Then, after force quitting, I reopen again, and get no new messages, the previously new messages I can click on and read. So at no time can I get messages, and continue using the app. I also had a draft email in progress, and received new messages, and then the draft message was non interactive. When I tried to quit the app, I saw a popup message about saving the draft, but also could not click on it. This problem does not happen at work on my internal network and no VPN. Our email is all POP based (yes you read that right, all POP no IMAP), FWIW.

I tried unticking enable and it did NOT work. Help! I want the stupid filter gone. I have struggled for two years with the junk filter which does not work right. I have done shift J. The filter does NOT learn. A week aog, I saw that I could uncheck enable and that was supposed to stop the filter. That also did NOT work.

Today, an email I forwarded to myself from another platform went in junk. I never wanted any junk filter. It has been nothing but trouble and now I can't even disable it.

I have been trying for days now to set up my Homail account into Thunderbird. It shows it there, but doesn't download any messages.I have tried every way I can to set it up, but, no joy. I even downloaded a programme suggested on Firefox, but that didn't work either. I also cannot find where to check the SMTP connections. I haven't had any problems with my Gmail accounts, they went straight in.

Good day,

I have installed the latest version for win64. Every time the software is downloading emails (I use POP3 for gmail), if I am concurrently doing something else with it (e.g. selecting an email with the right mouse button to delete it, or creating an event for the calendar, or just selecting something from the menu bar), the software gets stuck. I then have to kill it and restart, sometimes it takes multiple kill and restart sequences.

I am using Thunderbird from the very beginning o fit, but this issue is pretty annoying. Any advise?

Thanks and BR M

For quite a few months now, Thunderbird has been acting weird. My emails download, I can sometimes open and delete some, but after a short time, it gets stuck on one email and won't open any more at all. I also can't open any menus, but I can change inbox folders, but still only the original email is shown. It's really hard to troubleshoot and try to fix, as I can't get to any of the menus most of the time. This happens in safe mode as well. This is getting really irritating as I've been using Thunderbird for many years, and I'd like to fix it rather than find a new email program.

My email provider is terminating the existing email domain name, and replacing it with a new domain name. I want to retain all existing Thunderbird folders and emails for use with the new email. Example: username@q.com becomes username@myclk.com. (Yep, it's Centurylink.)

Can I change my existing Thunderbird account name and email and retain all existing folders and emails in the account? Some server settings would also be changed.

Or, do I need to set up a new account?

Thanks

Two questions:

1- Is it possible to assign defaults for ICS import so that you don't have to go through the wizard?

The reason for this wish is question two...

2- Why does the "Next" button in the import wizard appear in a different place in each step? I have a whole bunch of separate ICS files to import due to a workflow issue, and importing them is like playing whack-a-mole. It'd be a huge improvement if the "Next" button could stay in a consistent place so that even if defaults can't be set up, you can just click-click-click in one place without having to dance around with the mouse :)

In Windows and other applications when I hit space it moves the cursor or text I have the cursor in front of to the right a certain number of spaces. If I subsequently hit backspace it moves the cursor or text I have the cursor in front of back the same amount of spaces.

This is not how Thunderbird operates, if I tab the cursor or text I have the cursor in front of does move to the right 2 spaces, but when I hit backspace the cursor or text I have the cursor in front of moves back a single space at a time.

1) Is there a setting that I can change to have backspace move the cursor or text I have the cursor in front of the same distance back as the initial "tab" moved it to the right?

2) Can I adjust the number of space "tab" jumps from 2 to say, 4?

Thanks

Today - 26/01/2026 - Thunderbird keeps crashing for no reason. I receive a dialogue box to either quit or start Thunderbird again and to add to a crash report. I have been doing this all morning - no response. I have gone onto Mozilla Google search to see if there is a problem - nothing. I have shut down and re-started the computer - nothing happens. Please can you respond and maybe give me a customer service 'live' person who can talk me through this. I have used Thunderbird for over 15 years, but this is defeating me. I am in my late 70's and cannot cope with the way your Community site works. Thank you for your help. Hope to hear from you soonest.

When synchronizing via CalDAV with T-Online, Thunderbird almost always prompts for a password, even though all data is saved. T-online says, this ist problem from thunderbird.

How does one export one's private key (secret key) using OpenPGP in Thunderbird in Windows 10?

In this directory... C:\Users\meow\AppData\Roaming\Thunderbird\Profiles\yy677g4j.default-release\

I find these files... (I have obfuscated some of the file names) secring.gpg pubring.gpg 0xBBBBBBBBBBBBBB_rev.asc 0xAAAAAAAAAAAAAA_rev.asc 0xCCCCCCCCCCCCC_rev.asc

It seems that the secring.gpg file would contain 3 private keys, corresponding to the 3 public keys shown. I would like to ask how can I create a file containing the private key which corresponds to the "CCCCC..." public key but NOT containing the private key for any other key pair.

Thunderbird's OpenPGP menu allows me to easily export the public key, but does not seem to provide any mechanism for exporting my private key.

Thanks for your advice! ~uxfail

I operate a number of IMAP email accounts on Thunderbird. With just one, a load of my emails from my inbox end up in my deleted folder and I have to move them back again. I have set my deletion settings so that, if I delete an email, it is permanently deleted, so none of the emails I have deleted are in my deleted box. But it is still full up with emails from my inbox I don't want deleted. Any ideas how I fix this?