Thunderbird Community Forum

On Bazzite, currently I'm running Thunderbird version 140.8.1esr.

I only have one account set up in Thunderbird, which is my iCloud email account. I followed the steps in this guide to set up my iCloud email account in Thunderbird, and it went very smooth.

No matter what I do, no matter how many times I mark all folders as read, the icon in my dock ALWAYS displays a new mail notification.

I've removed and re-added my account twice, and have uninstalled and re-installed Thunderbird from the Bazaar store. iCloud on the web also does not show that I have any new messages.

Menu: Message>attachment>delete all

When delete all attachments for a message, when delete all attachments, auto move to the next message.

This behavior is annoying, usually I first delete all attachments and then reply but message position is in the next message.

This behavior is for example for version 140.7.1esr and 140.8.1esr.

102.15.1 work fine.

I have Version 140.8.0esr | Released February 24, 2026, for Linux Mint (up to date)

I have a CardDAV address book on a Nextcloud instance that i want to sync to Thunderbird.

When i open Address Book and the clikc on " Create a new address book" the Account Hub modal window opens. None of the 4 options (including Add Remote Address Book" do anything, i.e. I can click as much as I like but nothing happens.

I would like an apple (icloud) account to thunderbird, but it doesn't work the automated way. I changes password and made sure that account data and password fit. Anyway I got an error message and wasn't able to connect. I had no issues with outlook and the apple account, so I'm wondereing what I need to adjust or add. I want to finally switch all my accounts and systems to open source and getting them connected is my first step. Any help would be appreciated. - Thanks in advance!

Hi, somehow thunderbird forced me to use OAuth for caldav and carddav. (v140 on linux) Unless I've probably missed something this approach doesn't seem to have considered that people might use more than one device. In the past I had an application password per device with my mail provider. That password covered imap, smtp, caldav and carddav. The application password I could set with a specific name at my mail provider. If the device was lost, compromised or whatever I just deleted that one application password at my mail provider, problem solved.

Now a regular thunderbird setup has the application password for mail and 2 OAuth records per device under "Connected Apps" at my mail provider. But it is not possible to see anymore to which device the OAuth record belong, as there is nothing device specific coming along with these OAuth records, just an IP.

With that perspective OAuth weakened my security options, as I can only guess which OAuth record I have to delete in an emergency case. Did anyone who implemented that with Thunderbird considered that people may have more than 1 device? Maybe even more than 5 devices?

That OAuth approach looks unmanagable to me. Is there a way to switch OAuth off in thunderbird, until it becomes more useable in >1 device setups?

Cheers Tjareson

I frequently get messages that are all messed up due to fonts. Lines overlap, symbols instead of characters, etc. Is there some way to have Thunderbird use some other substitute font than this? Thunderbird 140.8.0esr (64-bit) on Linux Mint Cinnamon