Thunderbird Community Forum

"Thunderbird is being managed by your organization." how to get rid of this? my mail is effectively blocked :( says: DisableAppUpdate: active

Policy Name 3rdparty Set policies that WebExtensions can access via chrome.storage.managed.

I won't be able to see your reply... please use b[redacted email from community support forum]

Thunderbird is downloading new messages but failing to display them.

Other functionality remains active, ie I can see and open messages, delete all the contents of folders, compose and send messages, but when the software downloads new messages they simply do not display and cannot be accessed.

Not sure if it's relevant, but the message INBOX count appears to be stuck at the number 59, although more messages than that have been downloaded.

Bizarrely this is the message displayed whenever I now open the Thunderbird application (it was there when the problem first appeared and returns everytime). Out of desperation I even made a donation in the hope it would release the messages!

Thank you in advance, Steve Davidson

As a twelve or more years user of Thunderbird, I find it to be okay most of the time. I hate the spam folder that does not learn and I hate threads.

Today all of a sudden, I cannot save photos sent from my iPhone as jpg. I have always right clicked and a menu has appeared. Today, the right click just zooms in which I never want to do when I am trying to save.

I tried searchig online first before coming here. Apple is claiming that Thunderbird developers made a mistake and that is why the right click is not working. AI had me try a bunch of different techniques none of which worked.

When I do save after much effort, the "photo" in my Animals folder appears as the Thunderbird logo instead of the real item itself. The other weird thing is that my folders also do NOT show up where they should when I am trying to save. The menu doesn't give me all the folders as it always has. Instead it just say All Files which is not adequate.

I'm trying to setup Netzero email on Thunderbird. I get the error message, posted in question. Outgoing mail works but can't load inbox messages. I got the following error message when I first started Thunderbird - "The STAT command did not succeed. Error getting message numbers and sizes.Mail server pop.netzero.com responded: POP access disabled"

My cable company not doing email accounts anymore and has told me to use everyemail.com . For some reason I cannot use Thunderbirdto see my email anymore. I'm a 77 yr old widow. I have always had the Mozilla products. I don't know what to do and have nobody to help me. I hear my mail loading but can't read it. Please help. Claire Rogers chtycat@bendbroadband,com this email address is only good until the end of October. Thank you i don't know what version Thunderbird it is, It won't let me in to the mail I can only read it on a web mail at the server.

I have Thunderbird on laptop. I make changes to a contact in the address book and they seem to be made. When I close Thunderbird and restart it, all changes are lost and are back to what the contact information was before. This has to be fixed.

Bonjour. Plusieurs onglets correspondant aux messages ouverts dans thunderbird se sont fermés brusquement. Je voudrais savoir comment les réouvrir. Merci de votre aide.

For a few days I'm having trouble with Asana mails (notification mails informing me about replies, comments, etc).

Clicking on the mail to view it freezes Thunderbird for a good 5 seconds while one CPU core spins at 100%. This only happens with Asana mails (or at least I haven't found any other problematic senders).

I guess it's a problem with validation or parsing of the mail's HTML content. But I don't know how to debug this.

I can't pinpoint exactly when it started happening, but it was around the time I've switched to the [new snap release track](https://support.mozilla.org/en-US/kb/channel-choices-thunderbird-snap-and-flatpak#w_snap-channel-changes-in-2026). But since this happens with Snap and Flatpak I think the culprit may be the 153.0 update.

Things I've tried:

• Clearing cache and msf files.
• Troubleshooting mode with add-ons disabled.
• Reinstallation. Creating new profile + importing old data.
• Switching from Snap to Flatpak
• Switching Message Body display to Plan Text or Simple HTML.
• Disabling HW acceleration.
• Checking console for suspicious output.

Anything I can do to create handle the problem or collect information for a proper bug report?

For a few weeks now we have been unable to send emails through tbaytel server via Thunderbird. We get SMTP error. This happened after recent upgrades to Mozilla. Any idea when a fix will be out?

I am trying to add 3 outlook.com email accounts. The first one works. The other 2 fail on the outbound server. Each account uses smtp.office365.com. I use Oauth for both incoming and outgoing. Fails on identification.

I have tried everything I can find on line.

Ees

Is there a way to update existing calendar appointments by using an updated ics-file? We have appointments that are placed in the Calendar of Thunderbird, and there need to be modifications made over time. These appointments can be in the past, present, or in the future.

When trying to import a modified file, by just updating 'DESCRIPTION', and using the same ID, Thunderbird throws the error of: mail.import: : ID already exists for addItem

   onError resource:///modules/CalStorageCalendar.sys.mjs:203
   adoptItem resource:///modules/CalStorageCalendar.sys.mjs:220

CalendarFileImporter.sys.mjs:120:22

We need to be able to access the same appointment, and we do that from an external database.

Version: 156.0 (64-bit) snap on Ubuntu 24.04 LTS

I'm assiting an elderly user of Thunderbird. We were trying to update his saved password but the menu items did not match my current version 153.3.1esr. When I asked him to check his version he had options to update from v52. He went through 3 update cycles to v78 when all his data had disappeared. I found some information at: https://support.mozilla.org/mk/questions/1312391 which seemed to put the issue at a file format change in v78. When he looked at the profile folders the most recent was created in 2024. (I couldn't get him to find a modified date more recently.) When he closed Thunderbird and used the Run command "Thunderbird.exe -P" we couldn't find a way to select that most recent profile folder. Are you able to give me instructions I can use in a Windows remote (quick) assist session to restore his data from the profile folder?

Alternatively, is it possible to downgrade back to v68 of Thunderbird; would this restore his data (account settings, emails, contacts/address book etc?

Thanks in advance for any guidance you may be able to offer.

Hi, I have Thunderbird installed and have been using it to do my email on a self hosted server and to connect to a google calendar account. This has been working for years, but now I'm finding when I accept a meeting invitation via email, its not being put through to the Google Calendar. I've reset the google calendar link a few time (deleted and created again from scratch). Its using the caldav interface to Google calendar. I'm also seeing this random message pop up (see uploaded image) - but there is no details on what to do. Anybody have any clues?

Hi, I have TB on one laptop with 12 email accounts. If I add TB to another laptop, can I import the accounts from the original to save time with all the password and verification steps??

Connection error: Certificates. Works, doesn't work Thunderbird 157 intermittently fails to connect to imap.shaw.ca:993 with SEC_ERROR_UNKNOWN_ISSUER. It affects two separate Shaw email accounts, while Shaw Webmail continues to work normally.

Installed a week ago to replace MS365/ outlook Worked fine. But now it's acting up. Both my Shaw emails as well as my wife's email on her computer.

This does not happen with my domain emails.

I cannot use the attach button to attach files to outgoing emails. Alt+Shift+A does not respond either. I am running Thunderbird from the "Thunderbird Setup 157.0.1" installer. I am able to drag and drop but that method is rather unwieldy. I recently upgraded Windows 11 to version 26H2.157.