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Desktop PC running latest Thunderbird and Firefox. Started Thunderbird, instead of the usual tabs opening, it appears to have forgotten my accounts, asks for my email address, i.e. starting from scratch again. Starting Firefox, all previously-open tabs have gone, though bookmarks are all there.

Has there been some update which has wiped or reset Mozilla data? Yes, obviously I can go through setting up Thunderbird again but that will take quite some time and yes, I can use Firefox but many of the tabs I had open were there for a reason and it will take a while to find them all again.

Is there any way that the previous state can be recovered? My laptop has both applications running fine and I have paused Windows updates for a week, just in case the latest update caused this. Thank you.

Please tell me how I can remove this message. I have never seen it before and now I cannot read e-mails after 8/2/25 (I have been away for a few days).

I have tried to send myself a test message today but it will not go. I have tried cleaning out my mail server mailboxes but this has no effect. Running anti-virus software has no effect either.

Any help would be appreciated,

Thank you,

Tregarth

Bonjour, J'ai supprimé par méconnaissance le dossier "tous les messages" et j'ai perdu tous les messages dans mes dossiers ! Comment peut-on les récupérer ? D'avance merci pour votre aide.

For about 6 months now, my printers have been disappearing and reappearing at random...or so I thought. However, today, I left my Printer window opened while the printers were "Connected". I then proceeded to open the programs I regularly use: First Word. Nothing. Then Acrobat. Nothing. Then Chrome, still nothing. Then Thunderbird...Bam! Printers Disconnected. I said, let me try this again, and again, and again. Each time...same result. When launching Thunderbird...within 5 secs, the printers disconnect. It's the craziest thing I've ever seen. Anyone out there looking for a fun challenge? I've never seen this happen before and would love a resolution. Oh, and before it's suggested: I already checked the PrintSpooler service...connected or disconnected, it's status reads: "Running" in Task Manager.

Windows 10 (64bit), Thunderbird 128.7.0esr (32-Bit)

Without warning this has suddenly started happening. Maybe after the latest update? I can get the blessed Trash folder back in TB by 1. closing TB 2. (The Trash file is missing in Local Folders, the Trash.msf file seems okay)

   manually creating a new "Trash" file in my profile (a text file without suffix). 

3. restarting TB

The Trash does not disappear if it contains something when TB is closed.

I tried excluding the Trash in Windows Defender, but that has no effect.

Hi,

I'm searching for a possiblity to assign a task to a user, like it is possible for an event. According to RFC 5545 this should be possible for VTODO however in the GUI the "Attendee" field is missing. Is this an intended situation?

Regards

Resu0815

I use Thunderbird on two user IDs on the same Mac, which is running macOS 15.3.1.

I usually run Thunderbird updates on user 1, but this time I ran the it (to 128.7.0esr) on account 2, and I can no longer launch it on user 2. (Note: Neither user is an admin account.)

Steps: 1. On user 2, launch Thunderbird. 2. Get the dialog that there's an update to 128.7.0esr. 3. Click the Restart to update button. 4. Get the dialog that there's an update to 128.7.0esr. 5. Click the Restart to update button. 6. Get the dialog to enter admin ID and password for installing the Thunderbird helper. 7. Enter the admin ID and password and click OK. 8. Get a (surprise) dialog to authorize Thunderbird to discover my devices. 9. I choose to deny.

Expected result: Thunderbird relaunches, now with 128.7.0esr. Actual result: Get the dialog to enter admin ID and password for installing the Thunderbird helper.

10. Log off user 2 and log on to user 1. 11. Download 128.7.0esr from the Mozilla website. 12. Check the hash. 13. Install, choosing to replace the old Thunderbird in the shared Applications folder. 14. System Settings, About, System report, Applications 15. Verify the signature is signed by Mozilla 16. Launch Thunderbird

Expected and actual result: Thunderbird launches and I can use it normally.

17. Log out of user 1 and log into user 2. 18. Launch Thunderbird

Expected result: Thunderbird launches and I can use it normally. Actual result: Get the dialog to enter admin ID and password for installing the Thunderbird helper.

I'm guessing there's some manner of residual file that's preventing Thunderbird from launching on user 2. I've verified Thunderbird is in the system's Application folder and not in user 1's files.

How do I clear the pending install from user 2 so that Thunderbird will launch for user 2?

I believe I have it 90% setup correctly, but I still cannot get any outlook email to it. The folder shows up as: name@location.com

    Inbox

During the setup when I clicked on "Re-test", a green notice "The following settings were found..." Then I clicked on "Done" and I get a yellow notice "Unable to log in..." I repeated the "Re-test" and still, the green notice came up, clicked on "Done" and the yellow notice came up, as if it is in a endless loop.

Error message image (screenshot) defines the issue, how do I fix this?

I was never prompt for a password. Which is why no email was loaded for viewing. I am using 0Auth2 for password access. Thunderbird version 128.7.0esr (64-bit) Ubuntu version 24.04.2 LTS

Is there a "current" correct setup procedure that works, that I can use?

Hi I am having an issue with getting new contacts to add to a email group. It was working just fine and then, I couldn't add anymore new contacts. What is going on and how do I fix it? Sue

Emails in two of my inboxes (maybe all four) are randomly disappearing. None of my email templates are showing up in either of my two template folders. This started two days ago and I cannot figure it out. Emails get downloaded, then some are just vanish but are still on the servers. Repairing the folders does nothing, but folder properties on my template folders show the number of messages that should be there. Thanks in advance for any help you can provide.

Is there any way to get Thunderbird to show ICS files? Right now it just shows the contents as unusable trash in the email body.

Before anyone says it, toggling 'Display attachments inline' doesn't do anything. Enabling a calendar in Thunderbird allows the 'accept' etc buttons, but then I have to deal with the headache of a calendar in Thunderbird and still doesn't show the ICS file so I can use it with my actual calendar app.

Hello, when I'm on a web site and choose to contact them, I click on their email. Instead of opening Thunderbird opening I get the annoying pop up that wants me to sign in and open the new Outlook. I do not use Outlook. I do not want to use Outlook. What do I need to do to simply have my Thunderbird open and completely ignore the Outlook? Thank you,

When I create a calendar event, it will not show up in the calendar view (Month), even after trying several times. What I found is, it will only show up on the calendar if I uncheck the Notify Attendees box at the bottom, which is by default always checked. After I uncheck the Notify attendees box on an event, that event, and each successive event will then show up on the calendar, regardless if I have the Notify attendees box checked or unchecked. I looked to see if I can uncheck this box in Settings, but do not see where this can be done.

Is there a way to have the Notify attendees box unchecked by default when I create a new calendar event?

My company is switching to gmail and I rely on Thunderbird, so I need to add the account. I've followed instructions correctly, as best I can tell, but I'm sure I'm missing something. No emails are loading. I'm on Thunderbird 128.7, MacOS Sequoia 15.3.

I use an extension called FiltaQuilla that allowed me to create a filter like so: Folder name is Joe Blow Age in days is >30 Move message to Joe Blow in Local Folders

This allowed me to move older messages to an equivalent folder in Local Folders to keep from using up IMAP space. At some point, this silently stopped working. Now, nothing happens when I run my filters on the IMAP folders. The >30 day old emails remain in that folder.

I'm guessing it's an issue with FiltaQuilla, and probably needs to be asked of them. But that brings up a new question: has this ability been integrated into Thunderbird recently? Is there another way I can do this without an extension?

Hello, We have problem with sending and receiving e-mails. Sometimes Thunderbird just stops receiving e-mails. We can send messages but they can be saved only in local folder. In browser e-mails arrive and we can send them without any problems so it has to be some problem with Thunderbird. We were trying a lot of solutions, but only one works - creating new profile. It is very time-consuming solution, because we have to copy all e-mails, contacts, user settings, etc and we have to create a new profile couple times in a month... We were trying to off our antyvirus, forget password, etc. Probably there is some problem with certificates, but we do not know how to fix it. We use IMAP. Let me know what we can do to solve this problem, because creating new profiles is too tiring... :(

Regards, Maciej Sendziuk

I am on a MacBook M1 using Sequoia v15.3.1, running Thunderbird v128.7. I have been through many of the forums and also done Google searches, but have not been able to find a way to search for events in the calendar. When I am in the calendar and type a query into the search field, it will only search in messages. I have not found anything in settings that allows me to change this nor have I found any options available on the screen for searching only calendar events. I know there has to be a way that I am just not seeing. Also, there seem to be different options in view on the Windows version than in the Mac version and many of the solutions call for accessing a button or command that I don't see in the Mac version.

For nearly a year, now, I've been very happily receiving my YouTube comment notifications regularly and quite satisfyingly. Since this latest update, suddenly they are not showing up in any part of my INBOX, when I check my e-mail.

I've checked all the settings I can find, regarding notifications -- both on YouTube and Thunderbird. I changed a couple of things that shouldn't have made any difference, and they didn't.

I have three YouTube channels, and I tried switching to my earliest one as the "official" one that uses my lindawing2@gmail.com e-mail sign-in, hoping that that might make things work again. I had it set, before to my Grandma's Got Grace channel (which is my third channel), and that didn't make any difference, either. My other channel is Grandma's Gone Gaming. It also uses lindawing2@gmail.com for my sign-in. So I didn't bother trying to change over to that one.

I'm still getting ALL (and that's a huge listing every day) of my notifications under the bell, in the YouTube menu, but I don't care for the way those work. I MUCH prefer the way the Thunderbird e-mail has been processing those notifications for quite some time, now ... until the latest update.

This is very frustrating. The change has also affected notifications that I usually get from other channels (those by friends who have their own websites and/or chat channels set up, that allow me to ask for notifications of messages they send me).

I'm getting NO notifications at all, in my Thunderbird app, now. Period.