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Recently moved to Linux Mint with Thunderbird 140.5. It's a new experience. Thunderbird has downloaded all my emails and folders from my Outlook.com account. Can send, receive, edit emails no problems and all is visible from Outlook client on other machines. Thunderbird does not show my calendar entries or contacts. I do not wish to import from Outlook as I would like to access my Outlook.com from several locations. Been through online Help articles. Nothing seems to work. Have installed TbSync and Lightning Calendar Tabs add-ons with default settings. I have tried suggestions provided in this Mozilla Support. Other forum suggestions don't seem to relate to the version I have.

I'm sure it is something simple as everything else I have done with my new environment is working wonderfully. Thanks in advance.

Bill

Hi there, I'm experiencing an issue with the Microsoft Teams add-on in Thunderbird, specifically when using it with multiple Microsoft Exchange accounts.

Issue Description:

Previously, I was able to select between accounts using the Teams icon in the toolbar without any problems. However, after switching operating systems, the behavior has changed:

• When I hover over the Teams icon in the toolbar, the account selection menu appears as expected.
• As soon as I move the mouse to select an account from the menu, the menu disappears immediately before I can click anything.
• I've made sure that the mouse doesn't leave the icon or jump erratically, but the menu still vanishes every time.

This only started happening after I changed my OS. On my previous setup, the add-on worked fine.

Fixes Attempted:

• Removed and re-added the Exchange Accounts
• Reinstalled the Owl for Exchange add-on
• Fully uninstalled and reinstalled Thunderbird, including manually deleting the profile data folder
• Disabled hardware acceleration

So far, nothing has resolved the issue, and I haven’t found any other reports of this specific behavior online.

The attached image shows the account selection menu when hovering over the teams add-on, but as soon as the mouse moves over to the menu it disappears.

System and Application Details:

• Thunderbird Version: 139.0.1 (64-bit)
• Operating System: Kubuntu 25.04
• Desktop Environment: KDE Plasma 6.3.4
• Display Manager: X11
• Kernel Version: 6.14.0-15-generic (64-bit)

Any suggestions or workarounds would be greatly appreciated.

I'm trying to get the calendar app working in a new Thunderbird installation. Here are my notes on what I tried: https://addons.thunderbird.net/en-us/thunderbird/addon/lightning-calendar-tabs/versions/ Download lightning_calendar_tabs-3.8-tb.xpi (latest version) to C:\Users\ken\Downloads In Thunderbird: Tools --> Add-ons --> Gear icon --> Install add-on from file --> C:\Users\ken\Downloads --> lightning_calendar_tabs-3.8-tb.xpi "about:addons Lightning Calendar Tabs could not be installed because it is not compatible with Thunderbird 144.0.1." Any suggestions?

Can someone explain why the emails I write are still spell-checked, even though I have unchecked "Check spelling before sending message" and "Check spelling continuously" in "Settings" countless times? Even the Thunderbird add-on "Replywithheader" still checks spelling, even though I have unchecked "spell-check" there too. I don't want spell-checking, but I can't get away from it! It really bothers me.

Hello I want to use import-export tool and it is not possible now ? Please repair the function. thanks/CG

Moderator note (Denys): This question has been moved from the Firefox desktop forum to the Thunderbird forum.

I often end up typing the same email response, over and over.

Is there a way to set up pre-made messages in Thunderbird, which are easy to select or migrate into my reply space?

Would also be nice if these pre-made response mssgs were separate from my in/out box accounts, so that if I change IMAP email provider, I don't lose the pre-made mssgs.

Every now and then a folder flag will change to the drafts flag/icon, it seems to be a random occurrence which can happen to any sub-folder. Up until the most recent Thunderbird upgrade I had a working extension called FolderFlags which allowed me to go into the Folder properties and change it back but that extension no longer works with the latest version of Thunderbird and there is no alternative extension. How do I change the flag back to it showing as an ordinary sub-folder in my Inbox instead of Drafts? As an interim measure I've created a new sub-folder and copied the emails from the old into the new but that's not ideal at all. I hope somebody will create an updated extension but has anyone any other suggestions please?

In Outlook it is possible to have the favorites fixed in top of the folder pane column. This is very handy when moving emails from the inbox to often used folders which fall outside the displayed part of the folder pane. (You don't have to scroll back if you want to display the content of the inbox). I cannot find a way how I could do this in Thunderbird. Is there a way to fix favorite folders in top of the folder pane?

This question was asked 10 years ago but I can't find where a fix was ever found for the latest version of TB. I would really like to keep the favorite folders in sight while scrolling down through the other folders I've created.

Is there an add-on for this? I searched without finding one.

Since to old add-on enabling customization of the message header toolbar doesn't work now, where might get one the is compatible with Thunderbird?

Thanks, James

I have installed the "Start with Inbox" extension. I am trying to find the correct setting that selects the the top message in my message list and displays the contents in the message pane (reading pane). I've tried several of he settings. Here is the list of options.

Select and put the focus on: the last message.* the newest message.** the newest unread message.** the oldest unread message.** the inbox folder in the folder tree.

• Definition of "last": The last message that was put into the folder (independent from the date of the

       message)

• • If there are many accounts and/or many e-mails, finding the newest or oldest message can take some

       time.

(If the inbox contains no messages, the inbox folder in the folder tree will be selected and focused.)

None of the these produce the desired result. Does anyone have any suggestions?

Thanks

Hi there,

I'm looking for a mail client, which works portable. Unluckily the Thunderbird editor is real bulls... crap and miles far away from all other mail clients nowadays. All modern mail programs can handle different font types, colors, they all support different font sizes like 8, 10, 11, 12, .... point text hight and having tools like copy formats (mostly a brush) for easy formating.

Some years ago I was using an addon, which added this feature in some parts. I don't understand, why those features are still missing. Today we have 2025 and the time of plain text mails is history since 10 years.

The rest of Thunderbird is really great, especially the portable version.

Questions: 1) When will Thunderbird provide powerful and state of the art formating stuff? 2) Is there an addon which adds powerful and state of the art formating stuff?

Cheers, Kay

Hi! I have been using Shrunked Image Resizer's module for a long time (reduces the size of attachments before sending). It's no longer compatible with the new version of Thunderbird (140.1.0). I don't find any alternative module to replace it. What's the solution please?

I am trying to use the CardDAV Addon to sync my gmail contacts. I installed the addon but it doesn't appear when I go to Tools then Address book and then I go to new and nothing is there for create a new Carddav address book. I hope you can help me!

Windows 11

Thunderbird 142 64bit

Do add-on settings get backed up when backing up a profile? I always have to manually install my add-ons when reinstalling a profile. I have one add-on that is a pain to set back up (Identity Chooser), and I have assumed the settings for it are lost.

Is there an extension or add-on that can search like the old Eudora does? The default search does not seem to search thru headers or all email messages This is important for us when we need to find the Senders IP numbers so we can ban the spam emails

I'm on 141.0 (64-bit). It says I'm on the "Release update channel." Quickfolders isn't working. How do I get to an older version of Thunderbird where Quickfolders will work again?

I am able to use quick search on all of my folders EXCEPT the Sent folder and it's sub folders.

Example: When in the Inbox, I type part of someone's email and I see all the emails with that as part of the email address. BUT, when I do this for the SENT folder and any of the sub folders and nothing comes up. Even folks that I email several times a day it does not find them

When I put Thunderbird into Troubleshoot mode, the quick search works.

Another issue is when doing a global search for all folders, I will see something in sent, but when I click on it, Thunderbird does not find the email. This happens with the SENT folder only.

I have tried a few solutions, including rebuilding the Global Database and making sure this folder is part of that.

what am I missing?

Thanks for any help Chris

Hi

When clicking on: In Thunderbrid - Local folders - ImportExporttool NG - Import Mbox files - Individuelle mbox file Nothing is happening

How can I then import my mbox files?

Best Max

Can the order of the sub folders in email account folders be re ordered. Is the add on "manually sort folders" still available? I there another method of doing this.