Thunderbird Tekoha Aty

I have an MS email account which is passwordless and only uses fingerprint/passkey authentication.

How do I get TB to use this security method to gain access to my email? Currently, every time I try to add the email address/account, it asks for a password, which obviously I don't have.

adelphiaUK (Chris)

Please excuse misspellings and anything that may not make sense or cause offence as the medication I take can have an adverse effect on my mind.

I'm on Windows 11, I've archived my gmails to a 3GB zip and extracted it to a local MBOX file. I want to sue Thunderbird only to be able to conveniently see these emails. I don't want any accounts, nor to connect Thunderbird to the internet - I juust want to see the gmails.

I've installed Thunderbird, and the import/export Tools NG add-on. It won't let me import to a unified folder, so I deleted the unified folder. I have no "local folders", so I can't right click on one and select import. I can't see how to make one either, and the help is of no help.

I wonder if somebody could tell me, without assuming knowledge I don't have, how to do this please.

Thanks Chris

My cat laid too close to my keyboard (i.e., by the control, shift, and windows button) and I am now unable to send messages from any of my email address in Thunderbird. I've checked the server settings and they all appear to be correct, but I keep getting the error message that connecting to the smtp failed. I'm receiving emails, but can't send them. Is there anything else that I might be missing apart from checking the server settings.

Hi I am using thunderbird with the integrated events connected to various google domains. My calendar looks synchronized and notifications show up. I am on popos on a laptop. The thing is that a lot of time the notifications show up late; like not hours late, but let's say 5 minutes late and sometimes they don't re-appear after the initial reminder. So it's not 100% sure that you will get reminded or pinged at the right time. I have not figured out any specific rule when it works and when it won't. Curious if anyone else is running into such problems. Thanks Andreas

Dear Thunderbird Team,

I am writing to report a critical issue with the Thunderbird Extension API where it returns stale, cached data instead of live folder contents for Gmail IMAP accounts.

Issue Description The browser.messages.list() and browser.messages.query() APIs are returning outdated message data from 2016-2021, completely ignoring the actual current contents of my Gmail IMAP inbox. While Thunderbird's UI displays current emails correctly, the extension API serves permanently cached old data.

Evidence of the Bug What Thunderbird UI Shows: Current inbox with emails from today and recent weeks

Real-time folder contents

Proper folder synchronization

What Extension API Returns: Only 100 messages total (artificial limit)

Messages exclusively from 2016-2021

No emails from 2022-2025 present

Completely ignores current folder contents

Technical Details: Profile: /Volumes/Data/Mail Files/Thunderbird/Profiles/aq8q4la7.default-release/

Account: Gmail IMAP (imap.googlemail.com)

Folder: account1://INBOX

API Used: browser.messages.list(folderId) and browser.messages.query()

Steps to Reproduce Set up Gmail IMAP account in Thunderbird

Write extension using browser.messages.list() API

Compare API results with actual folder contents

Observe API returns stale cached data from years ago

Debugging Attempted We have tried:

Deleting all .msf index files

Clearing folderCache.json and global-messages-db.sqlite

Removing cache folders (cache/, cache2/, startupCache/)

Rebuilding folder indexes

Using different API methods (messages.query vs messages.list)

None of these resolved the issue - the API continues to return the same stale dataset.

Impact This completely breaks any extension that needs to access current folder contents, such as email tracking, automation, or filtering extensions.

Request Please investigate why the Extension API serves different (and outdated) data compared to Thunderbird's main UI, and fix the API to return actual live folder contents.

Thank you for your attention to this critical issue.

Best regards, Hasan

Yesterday I upgraded my PC from Windows 10 to 11. Today I discovered my Local Folders are not visible. Searching tells me the messages still exist, but TB does not show the folders. I did the same upgrade a month ago on a laptop (Windows 10 Pro to 11), no problems. I didn't externally back up the messages as I am a dinosaur and don't know how, but at least they are still on the hard drive. Thousands of them though so I need the local folders back. Tried all the fixes I can find on the Community Forum, without success. Can anyone help please? Bob

Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

Hi, I have my calendar connected to my Google calendar. It works great in both ways. I can add in Thunderbird and it show up in Google and vice versa. But one issue, when I get a meeting invitation and I accept, it always get in the "Home" calendar and not in my Google one. I have tried to sort them with my Google at top, and if I delete all other calendars it can not be saved at all. And can not find any other settings.

Any suggestions? Or is it just not possible? Maybe a function for a coming update? Or have I just missed out some obvious?

Best regards /Mike

When I try to send an email I get this message

"Sending of the message failed. An error occurred while sending mail. The mail server responded: Authentication required. Please verify that your email address is correct in your account settings and try again."

My email address in my account settings is correct. What can I do?

Issue Related to Backing Up Thunderbird Messages. Trying to back up both my inbox messages and sent messages. Problem relates to backing up inbox messages. First, attempted to back-up (sing the save as function) to desktop (folder). Plan was One Drive would back these up from Desktop. Have 199,000 messages in inbox. Did not save all of them. Then tried to save them in smaller increments to external storage (plenty of storage available). Successful with 4 back-ups of approximated 15,000 messages in each batch. Now will not back-up the full 15,000 ....last successful was 5,000 messages. When it fails, message says "Unable to save the message. Check your file name and try again later." The file naming convention has been the same for all files and have carefully checked to make sure it is not the file naming convention.

What is the problem? Does someone have a solution?

Can you please help me so I can successfully back-up all my inbox messages? Once I figure out an approach want to continue backing up messages using this approach.

Greatly appreciate your help!!

Best, Monica

Why do my new e-mails suddenly go immediately into my "Archive" folder and I have to transfer them to my InBox in the last few days? New e-mails have always gone into my InBox...until the last few days.

I thought for sure that Xfinity was moving messages to junk despite everything. It turns out Thunderbird is doing it. I turned off every setting I could find to keep TB from trying to filter junk. I reset training data. Still perfectly normal messages are sent to junk, and *even marking it as NOT junk, and even the address in the address book* TB moves the message to junk.

Problem in Thunderbird after creating a new email account from Proton Mail - Per9g@pm.me . Not receiving/not retrieving my emails from my email account, but can send emails from it. I have used the code from Proton Mail Bridge in the setup. See technical information below (account9): Programinfo Navn Thunderbird Version 140.3.1esr Build-ID 20250929214837 Distributions-ID Opdateringskanal esr User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Thunderbird/140.3.1 Styresystem Windows_NT 10.0 19045 Operativsystemets tema Launcher Process Aktiveret Multiproces-vinduer 0/0 Fission-vinduer 0/0 Aktiveret som standard Fjern-processer 1

Virksomhedspolitikker Inaktiv Google Location Service-nøgle Mangler Google Safebrowsing-nøgle Mangler Mozilla Location Service-nøgle Mangler Fejlsikret tilstand false Hukommelsesstørrelse (RAM) 7,9 GB Ledig diskplads 228 GB Konti for mail og nyhedsgrupper ID Navn Indgående server Udgående servere Navn Forbindelsessikkerhed Godkendelsesmetode Identitet Navn Forbindelsessikkerhed Godkendelsesmetode Som standard? account2 Lokale mapper (none) Local Folders 0 passwordCleartext account3 Pggotfredsen@youmail.dk (pop3) pop3.mail.dk:110 alwaysSTARTTLS passwordCleartext Per G Gotfredsen <Pggotfredsen@youmail.dk> asmtp.mail.dk:587 alwaysSTARTTLS passwordCleartext true account4 p.gotfredsen@icloud.com

smtp.mail.me.com:587 alwaysSTARTTLS passwordCleartext true account6 Pergg@live.dk (imap) outlook.office365.com:993 SSL OAuth2 Per G Gotfredsen <Pergg@live.dk> smtp-mail.outlook.com:587 alwaysSTARTTLS OAuth2 true account9 Per9g@pm.me (imap) 127.0.0.1:1143 SSL passwordCleartext Per G Gotfredsen - Per9g <Per9g@pm.me> 127.0.0.1:1025 SSL passwordCleartext true Biblioteker Bibliotek Status Forventet minimumsversion Version i brug Sti RNP (OpenPGP) OK 0.17.1 0.17.1.MZLA.140.3.1esr.botan C:\Program Files\Mozilla Thunderbird\rnp.dll OTR Kunne ikke indlæses. OTR chatkryptering vil ikke virke. - - -

I seem to recall that in the past I was able to change my "From" email address to another one for a 1-time use. Either I forgot how to do that or that option is no longer available. Can you tell me how to do it? I want to use an address that cannot be tracked for some emails (xx@duck.com). Thanks.

I cannot download e-mail from Mozilla Thunderbird. It says "Done" in the lower left corner and will not download when I hit the Get Messages key in the upper right corner. Please help me to be able to download my email.

Lightning Strikes again.

As soon as TB upgraded to 143 I had the following problems:

1. Half my folders disappeared. In this day and age, where emails are "official documents" to prove communications.... 2. I could not delete any email, folder. 3. I could not create a folder.

So, I deleted that installation and reinstalled TB.

Same issues. NO CHANGE with a clean install.

I have two Gmail email addresses. One is used for important messages. As of last Thursday I am not receiving some emails sent to this account. I asked sender to use secondary email and they come through. I’m very concerned that I’m missing important messages and need to get this corrected quickly. Please help if you can. If I need to delete Thunderbird I will but hope not.