Thunderbird Community Forum

Hi, everyone,

I have a strange problem with my TB installation - when I go to repair a folder through it's properies settings, TB deletes BOTH the message (mbox) file and the index (msf) file. There is nothing wrong with either (the folder is fine) - I'm just testing out TB's functionality as I'm moving to it.

The settings are set to always download everything and always keep everything. It's TB version 143. The reason I know the files get deleted is - if I disconnect the Internet connection and click Repair Folder, then go into the profile directory, the mbox file is just gone, while the .msf is sitting at 0Kb waiting for the connection to re-establish. Only the connection is back, TB re-downloads both the index and then ALL the messages in the account...! This is, obviously, highly problematic.

My question is two-fold: - is the expected behavior of the "Repair Folder" button to work offline? Should folder repair be possible even in offline mode? - has anyone else encountered this? I reported this on Bugzilla, along with another fellow who has encountered the same: https://bugzilla.mozilla.org/show_bug.cgi?id=1997845 But it appears the developers have a hard time believing it's actually happening...

Many thanks!

Hi, Microsoft recently changed the way Shared folders in OneDrive 365 business are managed. I'm referring in particular to folders shared by other users within my organization. Now you have to create a sort of link to the folder which appears in My files. Previously I used the odrive client to sync all my cloud accounts (OneDrive, Dropbox and Google Drive). Because of the changes, those shared folders cannot be synced by odrive anymore and I had to switch to the official Microsoft OneDrive client. With that, I can now sync the folders on my local drive but I cannot attach files from those folders to a Thunderbird message. While the folders appears as a link in the root OneDrive folder when I browse it with Explorer, when I click on the folder I see the files are local copies synced in my filesystem. Yet, Thunderbird cannot access them and gives the attached following Send Message Error: Sending of the message failed. There was an error attaching kickoff_novembre2025_6slide_V2.pptx. Please check that you have access to the file. Obviously I could make a local copy and attach that, but it is not convenient at all. Any fixes available?

It very important to me to be abler to Turn OFF Dark mode when a recent TB update defaulted to that mode.

Why? Because I have vision problems. So I run everything under Windows' "High Contrast" mode, which changes all displayed colors and backgrounds.

Given that is how my system is set,  Windows "flips" your new Dark Mode into a light and low contrast image that I cannot easily read. 

SO For users like me who must depend on Windows High Contrast settings, everything is fine as long as Thunderbird retains the option to TURN OFF DARK MODE. Please be sure to maintain this option Forever, or TB will become unusable to users like me.

Thank you.

I bought a Windows 11 computer that I am transitioning from a Windows 10 computer. I like to start out with a clean slate and install from scratch. I exported my feeds into a.oplm file from the Windows 10 Computer. Opening up the .oplm file is see text as "xmlUrl="https://feed.podbean.com/potcast name/feed.xml". Is that the url entry that I used to enter in the URL for the feed if I manually subscribe to a Thunderbird RSS feed?

I would like to know, if there is a reason that the Thunderbird Flatpak still remains on a version published on July 7. Iam switching back to Thunderbird, because of the new Microsoft Exchange Feature.

Is there a Timeline for how the Flatpak updates are delayed or anything that can be done to push the current version into Flathub?

Hi, I want to print a list of selected events in the calendar, is that possible? Or, is there an extension that does it? And in the dream scenario I could export the selected lines to Excel.

//LasseT

Thunderbird stopped working today. It won't download any messages, it wants me to enter a new password. I have the correct password and can log into my mail on wowway.net I did not touch anything, it just stopped working. All the POP settings are correct per wowway website. Should I uninstall it? It seems a new update was released on 11-12. When I opened it on 11-13, it didn't work. Please help. redacted@gmail.com

For the last month I have been unable to send outgoing messages from my Thunderbird program. Initially I also stopped receiving messages, but a local commputer technician helped resolve that. I can now receive messages but, if I try to send an email I still get this message: "Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: p-impout003.msg-pkvw.co.charter.net cmsmtp 68.235.43.158 blocked. Please see https:// www.spectrum.net/support/internet/understanding-email-error-codes for more information. AUP#Out-1120." I have tried to resolve this through Spectrum and was told I would have to go to Thunderbird Support.

Please replyby: email: redacted@columbus.rr.com

              Phone: redacted
           or USPS: redacted

Thank you for any response Richard E. Hartle

I have 3 different email accounts on Thunderbird. All was working perfectly yesterday. Today, none of the email accounts can connect with their respective email servers. (Two are Verizon/AOL and one is gmail.) I have tried various fixes with no joy. At this point I give up. My email is very important in my life (I'm 81 years old) and Thunderbird is simply way too hard to fix with non-existent help. (Your Community help line is a joke unless you have technical knowledge. Nothing ever quite fits the problem so it is no help at all.)

One day my beloved T.Bird got wacked. I have 4 accounts. Only one was visible and all under folders incl spam and trash was gone. I found the other 4 accounts under "accounts". But that did not help me. I could not get them up and work. So I do hope you can help me to restore the bird to work on condition.

Please: Do answer me at the only working mail which is redacted@karma.dk. I use my telephone now, but that is not optimal. Cheers: Claus Pedersen from Denmark.

Thuderbird is failing the intial install and then does not allow me to import my previous thinderbird profile since it does not show all files in a directory of from another Mac M1 on my network where it is still functioning. See the following as some processing a failing in this listing.

If more information is needed then let me know otherwise I see if I have and the previous release and try to restore from there. Basic information is not in the system such mail accounts , message filter rules which I use heavily. I had four active mail accounts anw on two were found but was forcing me to logon into two of the four accounts.

Need a fix!!!!!

Application Basics Name Thunderbird Version 145.0 Build ID 20251112194829 Distribution ID Update Channel release User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:145.0) Gecko/20100101 Thunderbird/145.0 OS Darwin 24.4.0 Darwin Kernel Version 24.4.0: Wed Feb 26 20:16:09 PST 2025; root:xnu-11417.100.564.505.3~2/RELEASE_ARM64_T8103 Rosetta Translated false Multiprocess Windows 0/0 Fission Windows 0/0 Enabled by default Remote Processes 0 Enterprise Policies Inactive Google Location Service Key Missing Google Safebrowsing Key Missing Mozilla Location Service Key Missing Safe Mode true Memory Size (RAM) 8.0 GB Disk Space Available 11.9 GB Mail and News Accounts ID Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account1 (imap) imap.aol.com:993 3 10 smtp.aol.com:465 3 10 true smtp.aol.com:465 3 10 false account2 (none) Local Folders 0 3 account3 (imap) imap.aol.com:993 3 10 smtp.aol.com:465 3 10 true Libraries Library Status Expected minimum version Version in use Path RNP (OpenPGP) OK 0.17.1 0.17.1.MZLA.145.0.botan /Applications/Thunderbird.app/Contents/MacOS/librnp.dylib OTR Failed to load. OTR chat encryption will not work. - - - Calendar Settings Home Name Value Name Type storage Disabled true Username URI Refresh Interval Read-only Suppress Alarms Cache Enabled iMIP Identity id1 iMIP Disabled iMIP Account Organizer Id Force Email Scheduling Popup Alarms Supported Alarms on Invitation Supported Max Alarms Per Event Attachment Supported Max Categories Privacy State Supported Priority Supported true Event Supported Task Supported Local Time Supported UTC/GMT Supported Auto-Scheduling Supported Home Name Value Name Type storage Disabled true Username URI Refresh Interval Read-only Suppress Alarms Cache Enabled iMIP Identity id1 iMIP Disabled iMIP Account Organizer Id Force Email Scheduling Popup Alarms Supported Alarms on Invitation Supported Max Alarms Per Event Attachment Supported Max Categories Privacy State Supported Priority Supported true Event Supported Task Supported Local Time Supported UTC/GMT Supported Auto-Scheduling Supported Crash Reports for the Last 3 Days Report ID Submitted Remote Processes Type Count Add-ons Name Type Version Enabled Location ID System theme — auto theme 1.4.2 true app-builtin default-theme@mozilla.org Dark theme 1.3.1 false app-builtin thunderbird-compact-dark@mozilla.org Light theme 1.3.1 false app-builtin thunderbird-compact-light@mozilla.org Legacy User Stylesheets Active false Stylesheets No stylesheets found Graphics Features Compositing WebRender (Software) Font Visibility Debug Info macOS PlatformmacOS 15.4.0 Asynchronous Pan/Zoom wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled; smooth pinch-zoom enabled WebGL 1 Driver WSI Info - WebGL 1 Driver Renderer WebGL is currently disabled. WebGL 1 Driver Version - WebGL 1 Driver Extensions - WebGL 1 Extensions - WebGL 2 Driver WSI Info - WebGL 2 Driver Renderer WebGL is currently disabled. WebGL 2 Driver Version - WebGL 2 Driver Extensions - WebGL 2 Extensions - Target Frame Rate 60 GPU #1 Active Yes Vendor ID 0x106b RAM 0 Diagnostics AzureCanvasBackend skia AzureContentBackend skia AzureFallbackCanvasBackend skia CMSOutputProfile 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 Display0 3840x2160@0Hz scales:2.000000|2.000000 DisplayCount 1 Window Device Pixel Ratios 2 Font Visibility Debug Info macOS PlatformmacOS 15.4.0 WebGPU Default Adapter [object Object] WebGPU Fallback Adapter [object Object] Decision Log HW_COMPOSITING available by default blocked by runtime: Acceleration blocked by safe-mode OPENGL_COMPOSITING unavailable by default: Hardware compositing is disabled WEBRENDER available by default unavailable-in-safe-mode by runtime: Safe-mode is enabled WEBRENDER_COMPOSITOR available by default WEBRENDER_PARTIAL disabled by default: User disabled via pref WEBRENDER_SHADER_CACHE disabled by default: Disabled by default unavailable by runtime: WebRender disabled WEBRENDER_OPTIMIZED_SHADERS available by default unavailable by runtime: WebRender disabled WEBRENDER_ANGLE available by default unavailable by env: OS not supported WEBRENDER_DCOMP_PRESENT available by default disabled by user: User disabled via pref unavailable by env: Requires GPU process unavailable by runtime: Requires ANGLE WEBRENDER_SCISSORED_CACHE_CLEARS available by default WEBGPU available by default Blocklisted; failure code BLOCKLIST_FEATURE_FAILURE_WEBGPU_MACOS_26_REQUIRED HARDWARE_VIDEO_DECODING available by default HARDWARE_VIDEO_ENCODING available by default VP8_HW_DECODE available by default VP9_HW_DECODE available by default BACKDROP_FILTER available by default CANVAS_RENDERER_THREAD available by default ACCELERATED_CANVAS2D available by default blocked by env: Disabled by Software WebRender AV1_HW_DECODE available by default REMOTE_CANVAS disabled by default: Disabled via pref unavailable-no-gpu-process by env: Disabled without GPU process blocked by runtime: Platform not supported VP8_HW_ENCODE available by default VP9_HW_ENCODE available by default AV1_HW_ENCODE available by default GL_NORM16_TEXTURES available by default WEBGPU_EXTERNAL_TEXTURE available by default Media Audio Backend audiounit-rust Max Channels 2 Preferred Sample Rate 48000 Output Devices Name Group Vendor State Preferred Format Channels Rate Latency Mac mini Speakers builtin-internal-mic|spk Apple Inc. Enabled All default: F32LE, support: S16LE S16BE F32LE F32BE 2 default: 48000, support: 44100 - 96000 487 - 4568 RemotePCSound RemotePCSound IDrive Inc. Enabled None default: F32LE, support: S16LE S16BE F32LE F32BE 2 default: 44100, support: 44100 - 192000 14 - 4096 100012584 MTC Enabled None default: F32LE, support: S16LE S16BE F32LE F32BE 2 default: 48000, support: 32000 - 768000 103 - 4184 Input Devices Name Group Vendor State Preferred Format Channels Rate Latency RemotePCSound RemotePCSound IDrive Inc. Enabled All default: F32LE, support: S16LE S16BE F32LE F32BE 2 default: 44100, support: 44100 - 192000 14 - 4096 Environment Variables MOZ_APP_SILENT_START MOZ_CRASHREPORTER_RESTART_ARG_2 XRE_PROFILE_LOCAL_PATH MOZ_CRASHREPORTER_RESTART_ARG_1 -foreground MOZ_CRASHREPORTER_PING_DIRECTORY /Users/nicholasmraz/Library/Thunderbird/Pending Pings XRE_START_OFFLINE XRE_RESTARTED_BY_PROFILE_MANAGER XRE_PROFILE_PATH MOZ_APP_RESTART 1 MOZ_CRASHREPORTER_DATA_DIRECTORY /Users/nicholasmraz/Library/Thunderbird/Crash Reports XRE_BINARY_PATH MOZ_SAFE_MODE_RESTART MOZ_CRASHREPORTER_EVENTS_DIRECTORY /Users/nicholasmraz/Library/Thunderbird/Profiles/oy2zoc92.default/crashes/events MOZ_LAUNCHED_CHILD Important Modified Preferences browser.search.region US doh-rollout.home-region US extensions.lastAppVersion 145.0 idle.lastDailyNotification 1764095308 media.gmp.storage.version.observed 1 network.cookie.CHIPS.lastMigrateDatabase 2 places.database.lastMaintenance 1764095309 privacy.bounceTrackingProtection.hasMigratedUserActivationData true privacy.purge_trackers.date_in_cookie_database 0 privacy.trackingprotection.allow_list.hasMigratedCategoryPrefs true security.sandbox.content.tempDirSuffix 16eefcf8-c72e-4f41-a4f3-56949c7e68c8 storage.vacuum.last.index 0 storage.vacuum.last.places.sqlite 1764095308 Important Locked Preferences fission.autostart.session true media.utility-process.enabled true Places Database Accessibility Activated false Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.37 4.37 NSS 3.117 3.117 NSSSMIME 3.117 3.117 NSSSSL 3.117 3.117 NSSUTIL 3.117 3.117 Sandbox Content Process Sandbox Level 3 Effective Content Process Sandbox Level 3 Startup Cache Disk Cache Path /Users/nicholasmraz/Library/Caches/Thunderbird/Profiles/oy2zoc92.default/startupCache/startupCache.8.little Ignore Disk Cache false Found Disk Cache on Init false Wrote to Disk Cache false Internationalization & Localization Application Settings Requested Locales ["en-US"] Available Locales ["en-US"] App Locales ["en-US"] Regional Preferences ["en-US"] Default Locale "en-US" Operating System System Locales ["en-US"] Regional Preferences ["en-US"] Remote Debugging (Chromium Protocol) Accepting Connections URL Printing Modified print settings

Downloaded Thunderbird in Kubuntu. Transferred my yahoo mail account, can see and open the emails in the local folders but can not move email to any folder but trash out of inbox

We cannot loggon to our thunderbird e-mail account. we have used this for several years with no problems, now they want a password I've tried two that I thought were the right ones but no success, I am stuck and need help. Thank you.

I am having problems being able to send emails if Surfshark is activated. Been working with Surfshark for the last week or so. So far no luck. FYI: I do run Bidefender, AVG TuneUp and CCleaner. I have added an exception to Bitdefender. No changes to not being able to receive or send emails. None of my settings have changed in Surfshark or Thunderbird. Using Open VPN protocol and am getting a message all the time about Thunderbird trying to connect with connecting to imap.comcast.net and it just stalls there. If it does get sent, it does not get saved to the sent folder.

Also, at times when I close Thunderbird I have to go into task manager and delete before I can open it up again.  Any ideas?  Thanks

Installed Thunderbird 145 (64 bit) on my windows laptop and didn't add any add-ons or theme! I moved from outlook to thunderbird hoping to have a better experience. Aside connecting thunderbird to the mail server, I also converted my former .pst email file into thunderbird file so that I can have access to my former emails. I have problems with some emails that keep cropping in my mail box even though I delete them!! I keep removing them and / Or putting them in the trash but they keep coming!!!

My emails go out and in successively but this problem is giving me a headache and increasing the trash folder. Troubleshooting mode seems to fix it, but as soon as I restart thunderbird, those recurring emails come back!! pls advise what to do next??

Thank you.

Dear, I use my personnal account to contact you for a problem on my Professional Thunderbird mail box. I am using for my job a Professional Thunderbird mail box Version 140.4.0esr (64-bit). Before, I had to enter only the mail adress with password. Now, a double authentification with Microsoft Authenticator is required; but no mobile terminal is dedicated to this mail box so I cannot have access anymore. Do you have a solution ?

Thank you,

Best regards

Jean Salabelle