Diễn đàn hỗ trợ Thunderbird

I am running Version 140.10.1esr (64-bit) on Windows 11 and would like to subscribe to my Calendar on Nextcloud. Yesterday, in Nextcloud, I set up an app-specific password and saved that to the Password Manager in Thunderbird. I also saved the app-specific password to my Bitwarden vault. The Calendar synced just fine.

However, today, when I booted up Thunderbird, it said that it needed the password for the Calendar. I entered it in, and then looked to see if the password was in the password manager; it was.

What's going on here and how do I fix it?

Good afternoon!

We use Thunderbird for our business across several computers. However, on the main computer, we've suddenly received blank tabs at the top of the page, as if an open email thread is there. There are about ten or so of these blank open tabs, and you cannot exit them. The X button doesn't work on them, nor does Ctrl + W.

I've uninstalled and reinstalled the software, and we've tried a shutting everything down and restarting the computer, but nothing seems to get rid of the tabs.

Is this an issue others have experienced and, if so, what's the best remedy for it?

Thanks in advance!

Hello from Sweden, and I'm sorry if any grammar or expression is incorrect.

All of a sudden login credentials is asked for (see attached image), for an old account that I've already (a couple of weeks ago) deleted both in Thunderbird and also on the server (on sethpylad.se). I always click the Cancel button when this comes up, but I don't understand this at all because when I try to send an email to the existing new account on the same server it all works as it should? So it seems like it only ask for credentials for the old/deleted account?

Is there any way I can change any setting to not be annoyed by this from here on?

I'm using a HP laptop. And on my desktop computer I can't really recall having this problem at all.

Edit: I just deleted an Address Book that was associated with that old account, but the problem prevails. /edit

Thanx in advance! Seth Pylad from Sweden

There is an attachment with searchresults. This searchresult belong to an accountname with an emailadres of my own. But in the searchlist there is another To: address. Here it is Gospel Music Hoogeveen | Tineke

It should info@contras.nl

How did I get this and how do I get rid of this.

Support will be appreciated.

Henk

New email account successfully added on a pc and an android phone. However, Thunderbird fails to add the same account on a different pc. All details are correct. Please help

Since the last update , Tbird is either a default window occupying ~1/3 of the screen , or full screen. The horizontal divider between message list and messages works. resetting/changing font size didnt solve it neither did

changing toolkit.legacyUserProfileCustomizations.stylesheets from false to true

or creating a new profile

OS linux mint 22.3 Tbird 140.10.0esr

After using Thunderbird without issue for several years, yesterday suddently it stopped receiving new emails. It seems like the connection times out. My internet service provider hasn't been able to help me, they guided me to change some settings but it hasn't worked. In the end they have said to just use their webmail, which I find difficult to use and disorienting.

Please help me get my Thunderbird back up and running.

Every so often I get an error message "Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors." I understand these if I am sending multiple large attachments as I am using Imap and the Sent folder is on the server. But I got it today with a simple pdf attachment. Is there anything I can do to alleviate this problem ?

Edition Windows 10 Home Version 22H2 Installed on 6/26/2024 OS Build 19045.6466

Thunderbird 140.10.1esr (64-bit)

Since yesterday (27 Apr 2026) any and all mail that comes into Thunderbird gets marked as SPAM. I searched online and found people saying that I could reset the junk training filter, so I did this, but incoming mail was still marked as spam. The next suggestion was to delete the training.dat file. Did that, restarted Thunderbird and incoming messages are still marked as spam. The last suggestion was to turn off adaptive junk mail controls. Didn't want to do that because I assumed that it would let spam through. Nope. Turned it off, restarted Thunderbird and two emails from my work came in and got flagged.

I'm running version 140.10.0esr (64-bit) on Windows 11. I am using IMAP to connect to the mail server but it's not running any spam detection software (like Spamassassin). I know this because it's my server and even if it was, no updates have been preformed since the first of this month and this just started happening yesterday. Combine this with the bug that Thunderbird notifies me of incoming mail, even if it's spam (didn't post about this because there are plenty going back a couple of years), is starting to make me look for an alternative.

The attached message pops up when in coming mail is coming in, not anything gong out. How can I fix this. See attached image. I have checked my sent messages..nothing shows up..I have checked my out box in local folders still nothing shows up