Thunderbird Community Forum

When I click "Empty Trash," the trash is emptied. However, the status indicator (number of emails) remains unchanged until I click the trash icon again. Is there a missing "Refresh" function?

I have created several categories that I use to assign a color to each of my calendar event entries. When I do this, the event shows a very thing stripe of my assigned category color down the righthand side of the entry. I would REALLY like the entries to be colored entirely with my category colors rather than that tiny stipe. Is this feature available and if not, I am hoping it can be considered in the very near future.

Dear Community,

I have a LAN connected desktop Windows 11 computer using Thunderbird 140.10.0esr (32-bit) synced to two different Apple calendars with no issues.

I also have two Wi-Fi connected laptop Windows 11 computers using Thunderbird 150.0 (64-bit) each synced to the same two Apple calendars above. I haven't had any sync issues with these until lately and I believe they are setup exactly the same as the desktop computer above.

For example if I attempt to "Add" a calendar entry I will get the following error message: "If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right clicking on this calendar in the list in the calendar or task view."

I have tried removing the calendar and adding it back but I still get the same intermittent sync issues and get these type of error messages. I have no extensions.

Not sure if this might be a software bug in the latest 150.0 (64-bit) release because 140.10esr (32-bit) appears to work fine on my desktop computer.

Any suggestions would be greatly appreciated. Many thanks.

I recently created a Google Workspace account. There, I have a user profile with a custom email address. I've set up the new account in Thunderbird, and it is working as expected. If I send a message from my "external" account to the workspace account, it arrives, and I'm able to reply back.

One feature of Google Workspace is what they call "alternate email" addresses. They sort of work as an alias for the native address. I have created one such alternate. If I send a message from my external account to the alias, it arrives correctly in the workspace account. However, when I reply from the workspace account, it does not go back to the originating address, but instead it is addressed back to the alias. If I repeat the experiment from the Gmail web interface, it replies to the correct address.

I've downloaded all the headers, and the Return-Path tag is correct. I can provide the full header if needed.

It feels like there is an invisible forwarding action to get from the alias to the workspace account, and that the reply action is incorrectly finding the interim alias. But that doesn't really seem to be what I see in the headers - although I'm probably not the most expert reader of those.

And it isn't necessarily a Thunderbird issue. I can see that there could be something going on with Google. But this is a good place to start...  :-)

Hi, I am hoping that the community can help me find an answer to this. I have two computers that I use for work. The one in the office has TB running all the time and before I leave for the weekend/vacation I would close TB, copy the profile folder to a USB (or copy it to cloud) and then paste the profile folder on my work laptop (at home). While all the settings get copied (local folders structure, addons etc.) as I use IMAP, it downloads all the mail on the new system regardless. I thought that it should have the latest mail downloaded as part of the profile folder, is that not the case? The bigger issue is that none of the Completed Tasks Lists, Templates, etc. get updated. It still shows all the older stuff on the work laptop and no updates carry over from the PC (at work). Going through the profile folder I see multiple copies of the files prefs.js, folderCache.json, global-messages-db.sqlite appended as: prefs-computername.js and folderCache-computername.json etc. (The computername is the name of the PC - office/laptop) The profile name is the same between the two computers. TB is only started after the profile is copied locally. TB version is the same between systems. I am left scratching my head why somethings are copied but not others. Hoping that the community can help me here. Thanks!

I used to get REMINDERS for all events/tasks until about some months ago. But now I don't get the reminders for most events/tasks. rearly I do get reminders randomly and ocasionally. I have been using TB (Thunderbird) for many years without any problems. I update TB religeously as updates become available. Please advise the fix. Thanks in advance! Anil Deshpande

I have Thunderbird on Windows 11. I have been using Local folders for a long time without any problems. I now find that if I try to delete subfolders in Local folders, they reappear as if they had not been deleted. This applies to any mails I have received since 28th January 2026. Could this be associated with a windows update?

After tried many suggested steps to trouble shooting the problems, it still can't download Comcast emails. It keeps pop up "enter password" or "password failed" again and again. But I can send emails. I can't upload the trouble shooting information file to send. Thanks

I can't access to my personal Google account from Thunderbird.

Thunderbird configuration is OK. Cookies authorised.

e-mail account connection process goes this way: - I enter name and e-mail address - I confirm standard configuration found in Thunderbird's FAI database. - Google asks me to confirm that I authorise Thunderbird to share mail, contacts and agenda informations (I was asked my Google pwd only the first time I tried the process). - I confirm my consent - Back to Thunderbirds account configuration window, with "authentication error".

Similar failure when I try to only connect to the contact list or to my calendars (which is my initial will), also from a scholar Google account.

No change after update from 149 .0.2 to 150.0

I have been using TB to access my Office365 account using the TB Oauth protocol, however, it got to be painfully slow when trying to download messages. I had set up rules and folders that worked, albeit slow.

To try to alleviate the slowness I started a new profile to my Office365 account again using Thunderbird's OAuth protocol. It's lightning fast! But it didn't bring down any of my Office365 folders that exist up on the Office365 servers. (see 2nd TB Install screen print below) It had brought down all the folders and previous e-mails in the 1st installation. (see 1st TB Install Redacted. Screenprint below)

I don't know why this might happen, does anyone have any ideas? Is there a workaround or could I be doing something wrong?

Thanks

Dan

When I try to create a calendar event.. Error Message: Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp-mail.outlook.com timed out. Try again.

Hello dear support team Some e-mails in the Inbox are of a huge size, like 32 MB and more, even without attachment. I already used repair function, but it stays the same. In Outlook, the same email is of normal size (80 kb). So, it is not the e-mail provider or the database at the provider. I have had this situation throughout several updates, so it is not specific to a certain update. The ones that have an attachment and the same problem (attachments of less than 1GB but show 42 GB) cannot be moved. The error dialog says: to big to move. Also, the attachments cannot be removed as they show 0 kb and the attachments name is crossed out. This is not true for all mails, but some have this problem. What do you recommend?

I receive emails from one source that's supposed to have a banner image at the top. In Thunderbird it shows the broken image icon and the image as an attachment. But in RoundCube it shows as expected.

The html shows:

The image part of the email shows: content-id: <piXdKIOofB>

I'm guessing that those angle brackets around `content-id` are breaking the display, such that it's calling that a mis-match.

Name Thunderbird Version 140.9.1esr Build ID 20260404050724

When I drag an email from the inbox to a subfolder for that account it disappears from the inbox and doesn't reappear in the destination folder. Started fairly recently. Search can't locate it. Moving using the menus also doesn't work most of the time.

Version 140.9.1esr (64-bit)

Can somebody help please It says after I have entered all the details problem with configuration, password or account name I have set up an app specific password on icloud

I have always used the default option to block remote content in emails, and I always see the yellow box. However, I happen to have admin access to a server that sends me certain emails, and it has logged when I opened emails from there.

started getting errors 2 hours ago. TbSynch into hotmail.com worked fine for years. On 140.9.0 esr.

Deleted tbsync account, created new app password, and then used Autodiscovery. No go. Used every possible combination offered by tbsync. Kept asking for another password. Dead in water. Filed a debug report. Also use every app password for years.

ActiveSync configuration is: my email account as description my email account (hotmail) eas.outlook.com use secure connection via https best available ActiveSynch version