Thunderbird Community Forum

As the topic says, the message list turned from the usual dark-mode look, to a full black background after updating to 151.0.

Was this an intentional change? How can I revert it?

I have followed the instructions for transferring the Thunderbird profile from my old computer to my new computer. However, the updates do not come across. I don’t get all of the folders that I created on the old computer. The email works fine.

I don't use Archives or Templates. There is no folder on my servers that correspond to these and they are not subscribed in my IMAP settings.

They don't appear in the per-account view. But they somehow appear in the unified folder view.

I am not able to figure out how to make them disappear.

Help.

I have a Postfix/Dovecot server that hosts 10 of my domains from one IP.

When you open Thunderbird, it checks the domains you have preset. I have two. This happens immediately, especially if there is no new mail on the server. Everything works fine.

If you have other domain mailboxes open, and I have eight more, and you click the inbox on each one, Thunderbird stalls at the fifth mailbox, regardless of the inboxes' selected order.

tail -f /var/log/mail.log - confirms this.

I have reset or modified everything I can think of. My server is not throttling Dovecot.

This must be something internal to Thunderbird, possibly related to only using a specific mail server IP for all domains.

Google AI suggests assigning a unique local IP alias to each domain on my server so Thunderbird thinks it’s talking to 10 different machines. This seems extreme.

Any solutions?

I just replaced my WiFi router and was able to get 5 messages after new network set up, but now it can't connect to outgoing or incoming mail server.. I double checked all my setting with Spectrum and all looks good, but won't connect.

With help from Chatgpt I have tried all possible combinations of server settings, but even if everything seems OK it ends with the message that it is not approved. Chatgpt thinks that it the problem is OAuth not working, maybe because the mail addresses are too old, they are @dbmail.com, and webmail says that the server is outlook.live.com.

Because it was referred to, I discovered having received an email The sender had taken the easy way - for him - by replying to a message from 2024, of which I am one of the recipients. I did not see a notification, nor did it show in the received mail folder, which is orderd by date, newest on top. Ultimately I found it attached to the original mail from 2024. Is there a way to get a notification, handle such messages as separate mail and show them at their appropiate place in the received mail folder?

Last week I saved the attachments of an email to a new folder in Documents. Today I received a new email with attachments. I saved these attachments to the same folder. To my surprise the old files (from last week) got a new timestamp. The date is today and the time is a couple of minutes after midnight. Any idea how this is possible? PS. I'm using Thunderbird on an Ubuntu machine.

I updated Thunderbird to version 151 yesterday and my Outlook e-mail and calendars did not port across to the new version. Re-installing the e-mail account was fairly simply using the account hub. However, trying to add my Outlook calendars to Thunderbird is proving to be much more difficult. Any advice or suggestions would be greatly appreciated.

Trying to setup Thunderbird for wife’s new laptop… Her 4 separate email accounts with auto setup for the IMAP server info without issues. One account however will not – VERY frustrating as this works fine on her old laptop. Thunderbird setup now appears to have an extra (4th) field required when setting up the account: Usually, its just name, email address and password. I see there’s now an extra box titled ‘Your Login’ being required for auto login. I have no idea what this field should be set to. Also, when I attempt to do a manual setup for the account, the port numbers and server names shown on the internet are completely different to those used on auto, and still get rejected. Doesn’t help that MS trying (and succeeding) to confuse us with all this “Outlook vs Outlook Classic vs Outlook.com”. My wife is unable to continue her work until I get this sorted:-( PLEEEAAASE can someone help me setup this xxxxxxx@outlook.com email account in Thunderbird as an IMAP account?

I've successfully connected to a hosted Exchange server through EWS and NTLM authentication (kudos BTW). But there is a problem - often during operations against EWS I'm presented with "Login to account XXX failed" "Login to server YYY with account XXX failed". I can ignore it (cancel) and it will work for seconds or minutes but eventually reappear. Sometimes it's very frequent, sometimes is here and there. TL;DR; connection works, I can read directories and e-mails.

From looking at development tools I see these scenarios: 1. POST requests return 200 always (no messsage of course) 2. Eventually a POST would return 401. Then Thunderbird issues a GET, it returns 401 as well but response includes header WWW-Authenticate: NTLM XXXXXX. Then another GET is issued containing header "Authorization" with the value from previous response. This time it gets 200 and continues without POST requests without a dialog. 3. Sometimes there are more POST requests with 401 (I assume in parallel) before a GET is issued and then I see a dialog. Sometimes it recovers (regardless of whether I cancel or retry), sometimes gets stuck with 401 with dialog reappearing each time it tries something. This case it's similar in sense that thunderbird issues GET with 401 and WWW-Authenticate header, issues another GET with Authenticate header but still gets 401.

If I had to guess I'd say the problem happens when POST requests are issued in parallel, not sequentially. OTOH it might be a problem at the server, but it isn't very likely.

Couple months back had to restore computer. Wouldn't let me add my POP gmail account, said had to use IMAP. POP was no longer accepted or something to that effect. So I got IMAP set up. (Of course, I did save my old POP folder with some messages in it.) Ever since setting up the IMAP folder I only get maybe 30 messages each morning. Never more. Which is no way right. I've googled and tweeked the synchronization/storage settings and the server settings. Nothing works. I'll spend hours googling suggestions and trying them, then get frustrated and move on. Then a week or so later I go thru it all again. Nothing changes!! Still only get the very few emails each morning. About 30 or so minutes after the initial download of messages, I'll get a pop up saying imap connection lost. This is SO frustrating. I have no idea what to try next. I never had this kind of issue with any of my POP accounts. Any suggestions? I've probably already tried them but will certainly give it another try. Thanks! Lynn

When using the Quick Filter bar to search emails, only a partial list of results is displayed (approximately 2-7 messages). Switching the view from Table to Cards and back to Table via the top-right menu causes the full result list to appear instantly. Similarly, resizing the message list panel triggers the same refresh. I have already tried creating a new profile, but the issue persists. Has anyone else experienced this behavior, and is there a known fix or workaround?

Tags summary display has disappeared.

I can search for tags, but the convenient "tags folder" is gone. Please help.

Tried in safe mode with add-ons and toolbars/controls disabled. Error console is empty when assigning or removing tags.

Hi there,

I'm having an issue where I receive invitations by the owner of a calendar i subscribed to. I have to subscribe to the calendar to be able to schedule events with them.

When I receive the invite, it keeps saying "already processed" which is not the case. I dont have that event in my calendar and it has not been accepted.

I have checked that the subscribed calendar is not linked to my account (calendar settings, email account: empty) and the actual calendar is linked to my email account (calendar settings, my email account).

what should happen logically is the "subscribed" calendar should not be counted as my calendar, events should not be counted as already processed and invites should be clickable and then be transfered to the calendar linked to the receiving email address.

Mind you, thunderbird on mobile works like it should. Its only the linux client that has this issue.

Thanks in advance for any help.

Hello, I have an IMAP acocunt configured, the server is Zimbra and has several shared Inboxes inside my account. Each of these inboxes come with several subfolders (which have the same name in every Inbox), and I would only like to keep some of them displayed in Thunderbird, but the unsubscribe option does not work for a few of them.

I open up the "Subscribe" dialog, I can correctly navigate to the fiolders I want to unsubscribe and click them, which unchecks the mark. I click "Ok" and nothing happens. If I reopen the Subscribe dialog, the folders are checked, as if I did nothing.

Note that I can unsubscribe to most folder, only a couple of them have this problematic behavior.

I have tried enabling/disabling the "Show all folder" option in the Advanced account panel and Enabling/Disabling the local storage for these folders.

I have also tried to unsubscribe the folders, then manually erasing the mbox files and indexes in the account folder before clicking Ok. The msf file are immediately recreated.

In the screenshot, the folders marked with an arrow cannot be unsubscribed, no matter what I tried.

Have TBird 102 Installed on 2 Dell LapTop Machines - Win10 OS

The Installation Process Completes but am having issues with the

Incoming Email Server Settings, and the Out Going Email Server Settings. 

On One Installation ( Nov2025 TimeFrame) , the Emails come down into the InBox But Will Not Go Out.

On the Other Installation ( May 2026 TimeFrame ) ... Cannot set up Email Account ... username/password errors.

I have been using Tbird & Yahoo successfully for years. The Yahoo made the change to require OAuth2. After that change I did get new mail. After that I couldn't receive new messages. I decide this could be fixed by removing my Yahoo account from Tbird and setting it up again.

1. 1 starting from Account Setup, I enter my name, email address and password.
2. 2 Before clicking Continue I disable blocking on my pi-hole in case that could be an issue.
3. 3 A pop-up with a Yahoo ad appears.
4. 4 I click next and enter my password and click next again.
5. 5 I check a box to agree to some terms and Agree
6. 6 Tbird gives me a green box saying, "Configuration found in Mozilla ISP database.
7. 7 I ensure IMAP is selected and click Done.
8. 8 I get another pop-up from Yahoo
9. 9 I check a box to agree to some terms and Agree
10. 10 That green box turns yellow and now says, "Unable to log in at server, Probably wrong configuration, username or password."
11. 11 I can login to the Yahoo webmail page, and there I see a new message that start with, "Your Yahoo account XXXX was used to sign in to a new third part application on thunderbird."
12. 12 Accept cookies from sites is checked
13. 13 I am not using a VPN and my network is the same as when Yahoo and Tbird were playing nicely.
14. 14 Outgoing Server settings for Yahoo Mail list OAuth2 for Authentication method.

What else can I check to setup Yahoo with Tbird? Let me know if there are logs I can provide to help.

I am running Thunderbird 140.9.1esr on openSUSE Tumbleweed.

For a long time now, Thunderbird often runs at high CPU (80-100% of one core), for several minutes at a time (5-10 minutes). This seems to happen many times every day, with no apparent cause from my end. (I just got back from Lunch, and the fan on my laptop was going crazy because of the high CPU.)

What can we do to identify and fix this issue?

I opened Thunderbird today (technically Betterbird, I don't *think* any of the Betterbird differences would affect this) and my calendar is wider than the screen itself. I have no idea how to fix this. It might've happened because last time it was open, my laptop was connected to a larger monitor. I've attached a picture.

(I wasn't really sure what to select for the question topic; I went with accessibility because the issue is obviously affecting my usage.)