Thunderbird — Fora społeczności

I must have changed something because T'Bird no longer starts. I was trying to copy TB file from Win 10 to a Win 11 PC. That failed because some files could not be copied. But now TB is not starting up. I checked the Start folder and it is in there.

Suggestions please.

I am not able to send or receive emails on my computer using my Thunderbird account. I've tried using the instructions on passwords, but nothing seems to work. Irene

I am flowing emails from Yahoo Mail into Thunderbird 128.13 on a Mac M3 in macOS Tahoe 26.1. Suddenly some Thunderbird folder names are greyed out and italicized, plus I seem to be missing emails in those folders. I've tried correcting it but cannot find anything that makes a difference, so where are my questions: Why does that happen? How can I correct it? Where are my missing emails? Thanks in advance! ~ Heath

When I try and "Compact" my trash folder, I get the following error message: "The folder 'Trash on paul.landsbergis@gmail.com' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

There is plenty of disk space, but there is no option for "write privileges". The trash folder has grown to 632 MgB even though I keep deleting old messages from the trash folder!

Thunderbird can not receive emails but it can send them. Password is correct.

  ( Login to server pop.verizon.net with username ... Failed
    Connection timed out)

Account Settings -> Server Settings:

   The certificate for pop.verizon.net:995 appears to be valid.
   When viewing the certificate it is out of date.
   No option to add an exception here or under Manage Certificates

On another user on the computer Thunderbird is working.

Thanks

Is there a way to set up TB to download messages from the server together with remote content without ever opening them? At the moment remote content (pictures, etc) only downloads when I view a message. Naturally, remote content is allowed for everything in the setttings. What I'd like is to pre-download everything, so that, say, I could download the latest messages, board a flight, and work in transit without needing access to the Internet. Thank you for any suggestions!

Hi Thunderbird team,

First of all - thank you for the work you’re doing. I recently moved over from Postbox because Thunderbird has the reputation of being stable, powerful, and professionally maintained. I’m more than willing to donate around €50 a year if it means I can rely on it without spending weeks fixing basic things like Google Calendar integration ;)

So I’m assuming this is just a technical issue on my system, and I’m hoping you can help me understand what’s going wrong.

The detailed diagnostics are below I’m on macOS Sonoma, running Thunderbird 145.0 (aarch64), and the Calendar module is completely missing.

Symptoms: • When I create a new calendar, only “On my computer” is available. • No Google, no CalDAV, no ICS, no network calendar options at all. • Calendar wizard never shows Google OAuth. • No calendar provider appears in the UI. • Even after a clean reinstall, the calendar.provider preferences are missing in about:config. • My profile folder does not contain an extensions/ directory (so Lightning and the GData/CalDAV providers are not being created or loaded).

What I have tried: 1. Removed Thunderbird.app completely 2. Downloaded the correct aarch64 build from Mozilla CDN 3. Renamed my profile (…default-release → …default-release-old) 4. Started Thunderbird with --ProfileManager to force creation of a clean new profile 5. Thunderbird shows the “Profile missing” dialog but does not automatically generate a new default-release profile 6. After manually creating a new profile, the Calendar module is still missing 7. No calendar-related files are generated in the new profile either

My goal is simply to add my Google Calendar using the built-in provider. But Thunderbird behaves as if Lightning and the calendar providers are not bundled at all.

Question: How can I force Thunderbird to regenerate the full Lightning/Calendar provider set inside a new profile? Or: Which files or modules must exist in the profile for the calendar subsystem to load?

Any insight would be helpful — at this point Thunderbird cannot create any kind of network calendar at all.

Thanks in advance!

Kind regards,

Sandor Nieuwenhuijs

System diagnostics for missing Calendar providers in Thunderbird 145.0 on macOS 14.8.2

macOS version: ProductName: macOS Sonoma

 ProductVersion: 14.8.2
 BuildVersion: 23J126

Thunderbird version: Mozilla Thunderbird 145.0

 Executable type (from 'file'):
   Mach-O universal binary with 2 architectures:
     - x86_64: Mach-O 64-bit executable x86_64
     - arm64: Mach-O 64-bit executable arm64
 → So the correct universal binary is installed.

Profile configuration (from profiles.ini):

 [Profile1]
 Name=default
 Path=Profiles/2a3nceor.default
 Default=1

 [Profile0]
 Name=default-release
 Path=Profiles/gpr8c7hb.default-release

 [General]
 StartWithLastProfile=1

 [Install712DAF5A23ABECDC]
 Default=Profiles/gpr8c7hb.default-release
 Locked=1

Problem summary:

 • Thunderbird shows: “Profile missing. The profile cannot be loaded.”
 • Thunderbird does NOT auto-create a new default-release profile after renaming.
 • After manually creating a new profile using --ProfileManager,
   the Calendar module does not load at all.

Calendar-specific issue:

 • “New Calendar” wizard only shows: “On my computer”
 • No “On the network” option appears
 • No Google / CalDAV / ICS provider options appear
 • No Google OAuth login appears
 • Calendar subsystem behaves as if Lightning is not bundled or not loading

Profile folder contents (important):

 • The profile (2a3nceor.default) does NOT contain:
     - extensions/ directory
     - lightning module
     - gdata-provider module
     - caldav-provider module
     - ics-provider files
     - calendar-data/ directory
     - storage.sdb
     - local.sqlite
 • prefs.js contains no calendar.* entries at all
 → The built-in Calendar and provider modules are not being created or loaded.

Steps already taken:

 1. Removed Thunderbird.app entirely
 2. Downloaded fresh 145.0 aarch64 build directly from Mozilla CDN
 3. Renamed existing default-release profile to *.old
 4. Started Thunderbird with:
      /Applications/Thunderbird.app/Contents/MacOS/thunderbird --ProfileManager
 5. Created a new, clean profile
 6. Issue persists: Calendar subsystem remains missing in a fresh profile

Expected behavior:

 • Thunderbird should generate a new profile containing Lightning + providers
 • “On the network” → Google / CalDAV / ICS should appear
 • Provider modules should be created under the profile directory

Actual behavior:

 • Calendar subsystem fails to initialize
 • Thunderbird cannot add any network calendars at all
 • No Calendar provider files appear in the profile directory

Request:

 What prevents Thunderbird 145 from loading or generating the Calendar/Lightning subsystem on macOS 14.8.2, even in a clean, newly created profile?
 Which module or component could be missing or failing to register?

I have a big folder of similar letters I have to print. And I was wondering if it is possible to send the letter itself and its .pdf attachment (usually 1 page) as a single print job so they could be printed on both paper sheet sides. The reason I have to print the letter body is that Thunderbird automatically adds a footer with the printing time as well as the sender's e-mail, the date of letter's receipt, etc. Please, share any information if such thing is possible to do.

Hej, jestem okropna z komputerami. Zmieniałam w pracy komputer i zalogowałam się na Thunderbird. Nie miałam tam maili - ponoć lokalny mail?

Poprosiłam informatyka o przerzucenie maili. Niestety większość albo wylądowała w koszu, albo ich nie mam (mam maile z 2021, a nie mam z 2024?).

Stare konto było 'usuniete' z poprzedniego komputera. Utraciłam tam wszystkie maile z posegregowanych folderów. Zostały tylko te w odebranych i wysłanych, nawet po ponownym logowaniu.

Nasz informatyk kazał zmienić w konfiguracji serwera, katalog docelowy. Co zrobiłam. Nadal ich nie ma, po odświeżeniu.

Może jestem głupia, ale proszę o pomoc. Co robię nie tak...? Sprawa trochę pilna - potrzebuję tych maili.

Dziękuję!

I want to move my local folders from thunderbird laptop to android thunderbird Maybe if I could find the profile location for thunderbird android it might help, but where is it? The thunderbird android seems really lacking in access to configure it ... all over the search engine I find "how to import data and settings into android thunderbird" but every one of these references is actually just import settings, NO DATA IMPORT AVAILABLE that I can find.

Trying to report a bug in Thunderbird:

Subject: Missing message preview/snippet in Thunderbird 115 (Supernova)

Hello Thunderbird team,

I’ve been using Thunderbird 115 (Supernova) and noticed that the message list no longer shows a preview/snippet of the email body. In earlier versions, this was available as the “Message Preview Text” column, but in Supernova neither Table View nor Cards View currently display snippets.

For many users (myself included), having a one‑line preview of the message body is an important part of quickly scanning the inbox — it’s a feature Outlook and other clients provide, and it makes Thunderbird much more efficient to use.

Could you confirm if this feature is planned to return in a future release? If so, is there an estimated timeline? Even a rough idea would help us understand whether to wait for it or look for alternatives.

Thank you for all your work on Thunderbird — it’s a great project, and I appreciate the effort that goes into keeping it modern and usable.

After clicking on the message pop-up on the Thunderbird email client, the email appears blank,Open other windows to overwrite, then close other windows to resolve the issue. How can I view emails normally after clicking on the message pop-up

I'm using Thunderbird on Windows 11 with my Outlook email account. I can receive email, but when I try to send an email, it tells me the password is wrong. When I check the password in the Privacy and Security settings, Thunderbird has changed the password to a long string of letters, numbers, and symbols. I enter the correct password, but it keeps changing back to the incorrect password. I have tried deleting and re-adding the account. I have also uninstalled and reinstalled Thunderbird. Same result.

Hello, i created new folders in different mail accounts. but they are not visible. i checked the subscribe menu . the folders are visible and checked there. but still not visible if i left the menu. searching for the mail shows a result and the subfolder location. i can open the mail.

but still no folder visible thanks in advance for helping ideas Tom

PS the red arrow points to the new folders

hi

i have 2 pc's using tb , one can sign in to my outlook.com acct, but the desktop pc can not. have checked all setting etc

the working installation is on esr update channel, other on is not [so i have 2 difference tb versions]. both are updated

if anyone sees in a forum that i had email trouble recently pls note that i now have an old backup of win10 in service on the desktop pc. haven't yest found my way back to that forum to post the results of using peoples advice but they were very helpful

thanks if anyone can assist

hi all

have somehow got an imap and a pop3 [version of the same acct] acct on my main pc , but they are are the same TB acct if that makes sense. suddenly ive lost all msg's in inbox.

have opened Tb in troublshoot mode but no help. i also did an "impoort" which was no help

i have 2 inboxs with associated folders [which i don't want]. i was tackleling a problem with this acct in another thread and appreciate peoples
input there, but it was not completely resolved

i suspect i need to change both accts to either pop2 or imap , preferably the one where data is kept on a server so acct is syced with my laptop pc

any help much appreciated. thanx

update: just now i did a second "Import", this was successful and recoverd my inbox msg's, but id still like some help getting back to normal, thanks

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!