Thunderbird Community Forum

I would like to stop version 146.0.1 of Thunderbird from loading yahoo mail when executing Thunderbird in a annoying new window. Just started happening 01/05/2026. Thank you Jeff

Why are older emails disappearing from the Inbox? It didn't do this when I was using Windows 7SP1. Now I have Windows 11 and it seems the Oct and Nov emails I had have disappeared. Only Dec emails are in the Inbox.

Hello, Thunderbird stopped downloading my emails from [edited from public] @erols.com How do I reset ?

Edition Windows 10 Home Version 22H2 Installed on ‎8/‎18/‎2020 OS Build 19045.6691

Device Name Patrick-PC Processor Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz 3.40 GHz Installed RAM 8.00 GB (7.70 GB usable) Storage 4 GB HDD ST1000DM003, 119 GB SSD Samsung SSD 840 PRO Series Graphics Card Intel(R) HD Graphics 4000 (224 MB) Device ID 8A8FD085-FB3C-4423-9BCF-1B704DA63161 Product ID 00326-10000-00000-AA600 System Type 64-bit operating system, x64-based processor

I periodically get a T-bird notification "Server imap.gmail.com has disconnected". If I wait for 30 sec to a minute, the connection reconnects and everything is fine, until it does it again. If it disconnects in the middle of sending a message, the send action will freeze and perhaps, time-out if the disconnect time is too long. Any ideas about this periodic disconnection? I'm using version 128.9.2esr (32 bit) with Win10 pro.

Thanks, Tom Hayes

Hi all, I'm experiencing persistent and reproducible segmentation fault crashes with both Thunderbird (versions 140.0.1, 141, and 142 tested) and Betterbird on Arch Linux. The crashes occur consistently within 30 seconds to 2 minutes of operation, making the application unusable.

System Configuration:

• Arch Linux (fully updated)
• KDE Plasma 6 on Wayland
• Multi-monitor setup using DisplayLink/evdi drivers
• Firefox works perfectly fine (no crashes)

What I've Already Tried:

• Fresh profiles (completely clean - crashes persist)
• Safe mode with add-ons disabled
• Disabling hardware acceleration (MOZ_DISABLE_RDD_SANDBOX=1, --disable-gpu)
• Software rendering mode
• Multiple Thunderbird versions (140, 141, 142)
• Alternative client (Betterbird) - same crashes
• Full system upgrade

All crashes show the same signature in libxul.so during startup/operation. The stack traces consistently point to Mozilla's threading/compositor code. Notably, Firefox using the same libxul.so library works without any issues, which suggests this is Thunderbird-specific.

I believe the issue is related to KWin compositor interaction with my multi-monitor DisplayLink (evdi) setup on Wayland. The crashes are specific to Thunderbird/Betterbird and do not occur with Firefox, despite them sharing core libraries. Note that this problem happens on both x11 and Wayland.

I have extensive coredumpctl output available if that would be helpful for debugging. Has anyone else experienced similar crashes with multi-monitor setups or KWin/Wayland compositor issues?

Any assistance would be greatly appreciated!

When I let thunderbird compress the inbox and other folders, the not read flags on all new emails get reset as if I have read all of the new emails. Compressing the inbox and other folders should have no effect on the flags showing a message has not yet been read. That only makes sense. The not read flags getting reset started happening several versions before 145.

When launching Thunderbird, I get a pop-up saying Server "outlook.office365.com" reported en error. Further not all sent email are showing in the Sent Items folder. How do I track down and fix the error?

Many thanks!

Tim

When I receive a newsletter from my club, it doesn't show the pictures. It does describe the picture and warns it might be AI generated. If I reply to the email or forward it, the pictures are displayed. I suspect this might be a settings problem. The original email includes:

[image: A picnic table and benches on a stone surface AI-generated content may be incorrect.] [image: A group of people dancing in a room with lights AI-generated content may be incorrect.]

[image: A person and person standing next to a vase AI-generated content

may be incorrect.] [image: A person sitting at a table with food on it AI-generated content may be incorrect.] [image: A group of people sitting at a table with plates of food AI-generated content may be incorrect.]

[image: A group of people dancing in a room with lights AI-generated content may be incorrect.] [image: A group of women posing for a photo AI-generated content may be incorrect.] [image: A group of people standing in a room with lights AI-generated content may be incorrect.]

Can anyone shed some light on this?

For as far back as I can remember I've been using Mozilla Thunderbird on a old computer running Windows 7. I've a Win10 machine here so a few months ago, I downloaded the latest Thunderbird and I was suprised to see it looked very different. After a bit of experimenting I managed to get it looking familiar so I uninstalled it with the intention of trying it again early in 2026 when I've a bit more free time, So this morning I installed the latest version but it looks even more different now :-(

I'm not sure how to attach images here but if it works, the original one looked like Capture01 and this morning's one is like Capture02. I still had my installer from a few months ago so I installed that one and it looks the same as today's one. Notice that there's no menu bar any more and AFAICT I can only view email headers and not their contents. Also, the 3 boxes at the top RHS (for sizing the window / minimizing it etc) don't work at all.

Is it me doing something wrong - or are there maybe some settings somewhere that I need to experiment with?

I use a work email server outsourced to office365.com and Thunderbird v115.18.0 (64-bit).

I connect using Thunderbird with IMAP, and am subscribed to 100s of my folders there.

I reorganized my folders there, moving them about using THUNDERBIRD (not, as I've learned now, using the Outlook Web interface that I "should" have used). Needless to say, I was only moving subscribed folders about.

Now I find that the subscriptions to folders which have been moved or even deleted cannot be manipulated. Folders with the same name but now in different hierarchies can't be subscribed to.

I have removed the account, recreated it and Unsubscribed from EVERY FOLDER. But the erroneous subscriptions do not go away.

Hello, is there a way to setup thunderbird to automatically archive messages? I'd like to have the ability to automatically transfer old messages into an archive mailbox after X number of days.

I have been having trouble for awhile now with the preview pane not changing with a message archive, delete or even a new message arriving. The only solution I have found that works is to turn it off/on with F8. Have tried updating (currently on 140.6.0esr), unified folder debugging, and setting thunderbird to download complete message not in bits on AI suggestions. Doing same thing on laptop and desktop. Gmail, yahoo and outlook accounts. It seems to only happen when using the unified inbox folder. Cannot find any reports here in forums, but AI says it is a common complaint. Is there anything I am missing to try?

Emails seem to take a longer period to download into Thunderbird which means my emails with codes time expire before i receive them. If I go straight into my webmail at ntlworld.com they show up there immediately. Advice welcomed.

My os crashed. I have been a t.bird user for years. Luckilly took a backup file .thunderbird on flashdrive very recntly. new zorin loaded and comes with t.bird installed. i have no password. i have not yet done anything and ask for step by step help i have opened t.bird abd it asks for email and password. i did not enter anything

As of today (6th Jan '26) TB claims there are no new emails. This is incorrect, they are there on Gmail, and have appeared on my iphone. Can't find any way of getting TB to play nicely with Gmail, any suggestions for a work round gratefully received.

Bonjour, J'ai créé un message d'absence pendant mes congés, ce message à généré une saturation de ma boite mails, depuis je n'arrive plus à faire fonctionner correctement Thunderbird. Le lien entre Gmail et Thunderbird semble ne plus fonctionner. Comment dois-je procéder ? Est-ce que je peux réinitialiser les paramètres de Thunderbird sans perdre de données et si oui comment ? Merci