Thunderbird コミュニティフォーラム

Hello,

I'm new to thunderbird and i'd like to customize the layouts. I increased the width of the spacesbar by messing with the userChrome.css. however now it is overlapping on the other panels... I managed to fix it on the mail panel, but not the others. (see attached) can you help me find the proper CSS property?

thanks you.

My folders used to show a yellow diamond when there was new email in the folder. The folder colour does still change to blue to indicate unread email. When I open a folder, the yellow diamond still shows up on new email, as well as the unread flag. What have I done? How do I configure Thunderbird to show that yellow diamond on folders with new email?

Using Acronis True Image for Western Digital (ver 2025 build 41936) to backup my files on a daily basis. Recently the backup program has been stopping and reporting that it cannot access some Thunderbird files, even when Thunderbird was not running (1st image) I tried 'Compacting all Folders' in Thunderbird but the result was the same (2nd image). Lastly, I tried clearing the cache - the result is the same. In all cases Thunderbird was not running during the backup.

i realize that this is not a Thunderbird issue, but I've been unable to get help elsewhere. I wondered if anyone might have a solution since Acronis apparently sees the file as being accessed - is there a way to remove that?

Hi

When Thunderbird is started maximized it overlap taskbar if is set to hide and taskbar won't show until Thunderbird is minimized and maximized. Another way is to press the Win key two times. Then the hided taskbar can be shown/use. The same thing happens to Firefox. Only when is first started. Then if Firefox is minimized and maximized, press Win key two times, press F11 two times then the hided taskbar show/hide normal.

It is a setting that can be changed to start Thunderbird and Firefox in full screen and do not overlap hided taskbar?

I would like to know how I can control the timing of compacting the mailboxes under Linux and Windows. The reason why I ask is that every time compacting needs to be done, the prompt to do so comes up as soon as the Thunderbird interface finishes loading but before all of the mailboxes are finished updating,which can take several minutes. If I accept the compacting, it inevitably returns an error that it could not run because the mailboxes are still updating. Or I can cancel until I go through this the next time.

It would seem like a simple matter to either give the user a way to delay the compacting process, or have Thunderbird not initiate it until it is safe to do so to begin with.

I have tried to research this but have not found any answers.

bold text Hi, I have Yahoo mail and Thunderbird. I want to use TB as my main mail but still keep my Yahoo account as the data is stored by yahoo and I suspect I will loose my history if I cancel..

I leave my email and a couple of other tabs open when I shut down. I cannot make TB appear as a tab, it always opens full page.

Any ideas?

Thunderbird in the past showed a red number above the dock icon telling me I had so many new emails. The newest version I now have does not do that and I cannot find a setting for that. Anyone know how to get the number back????

no matter what i enter in settings, any time i minimize thunderbird in win 11 to tray, and then click on its tray icon to reopen it, it opens at this odd sizing every time. i always put it fullscreen again, and minimize, then go to open it again, and there it is, at the odd size again. no other program does this in my two machines. just thunderbird, and i have never set this size and placement, it just seems 'forced' every time, making me have to resize it every time i open it from tray.

I tried the Toolbar fixes in this forum and got the menu to show up, thank you. (Any menu in Compose mode had disappeared. Actually, both Firefox and Thunderbird icons on desktop and Taskbar had disappeared as well, and I had to reinstate shortcuts. This may or may not be pertinent.)

But when I try to add "Send" to the menu, using customize, the "Send" icon is nowhere to be found as an option, so I cannot add it to the Toolbar in Composition mode. "Send" is grayed out in all bold textmenus. If I use Ctrl-Enter, message does get sent. Using Windows 10, still. Perhaps this is an upgrade issue?

Von der Erstinstallation war ich gewohnt, dass von oben nach unten die Darstellung der Ordner wie folgt war: Posteingang / Entwurf / Gesendet / Archiv / Spam / Papierkorb / Local Folders /Postausgang / Unbekannt Nach der neuen Installation, die erforderlich war (Rechnerneuinstallation) ergab sich folgendes Bild von oben... Lokale Ordner / Papierkorb / Local Folders und dann alle meine selbst erstellten Ordner am Ende dieser Aufstellung kam die Zeile mit meiner web-Adresse xxxx.xx@web.de dann Posteingang usw. siehe oben aufgeführt Damit liegt der Posteingang am Ende meiner Ordner Auflistung und das ist über den unteren Monitorausschnitt hinaus, diese Situation ist für mich untragbar und deshalb werde ich wohl auf ein anderes e-mail Verwaltungsmedium umsteigen müssen. Eine Kopiermöglichkeit um die Ersteinstellung zu erreichen war kläglich gescheitert und jetzt ist das Durcheinander noch größer beste Grüße B. Bein

Hello community,

I'm trying to find a solution to probably a basic problem and one that been discussed a lot. I use Thunderbird on a Mac and want to remove the arrow indicator from the Subject field (screen shot attached). I've tried several different recommendations, but none work.

Any advice?

Ian

I am using Thunderbird 140.8.0esr (64-bit) on Kubuntu 25.10 multi-monitor configuration. New install, very little customization.

Thunderbird will not retain the window size or position for the main window or messages. I have have tried deleting both the xulstore.json and session.json files (one at a time and both). When I delete the xulstore.json file and restart Thurderbird, it starts maximized. When I set the position manually e.g. to use about 90% of the screen for the main window and about half the width and about 90% of height for a message window and then close Thurderbird I can see the new window size vales written into xulstore.json e.g 2493 x 1362 and 1501 x 1317 "messengerWindow":{"sizemode":"normal","screenX":"0","screenY":"0","width":"2493","height":"1362"} "messengerWindow":{"sizemode":"normal","screenX":"0","screenY":"0","width":"1501","height":"1317"}

When I close and restart thunderbird it reverts to opening in the center of the primary monitor at a smaller size than when I closed it. The values in xulstore.json have changed to 960 x 540 "messengerWindow":{"sizemode":"normal","screenX":"0","screenY":"0","width":"960","height":"540"} "messengerWindow":{"sizemode":"normal","screenX":"0","screenY":"0","width":"960","height":"540"}

I found a similar recent question if this helps with a possible solution: https://support.mozilla.org/en-US/questions/1527783 but I cannot locate the referenced userChrome.css file to see if there might be something similar to try.

I am also using a multi-monitor setup. If I move the Thunderbird window to the second screen and close it, it always re-opens on the primary display at the 940x540 size. Thanks!

Thunderbird 148.0 moved trash folder from top group in folders pane to alphabetical order in lower group. Reopening Thunbird didn't help. How to get it back into place? Thanks!

I configured a series of "Filters" on my account inbox (imap), that move certain messages into specific (sub)folders. E.g. "To: certain@address.de" , filter applied when fetching messages "before junk detection" (German UI: "Filter anwenden bei: Nachrichtenabruf").

The filter seems to just silently fail and do nothing, since I also use my Android K9-Thunderbird app (imap) on the go.

How can I get my Thunderbird desktop filter to work again, even when imap fetching/accessing new messages with the phone?

Thank you for your informed insights

Update: screenshot of filter added (de)

I received an IMAP email as normal, from an email address that I often write with. What I always do: the IMAP inbox is forwarded move on arrival to the local inbox. It had an attachment, and I downloaded that as normal. Then after 5 minutes I wanted to start work on the reply to the message in the local inbox and ... the message was gone. Nowhere to be found. Not in the IMAP inbox (of course), not in junk, not in trash. I looked in the on-line IMAP account, and there the message was present as normal.

Then I searched for the email and there it shows: in "Inbox". And I see one strange thing that I never saw: column Message threads says: "This subthread is ignored". So that is the problem. Probably I hit accidentally some key (k ?) and this caused the "kill".

Now how to un-ignore it? There is this Help page: https://support.mozilla.org/en-US/kb/ignore-threads and it says: "To un-ignore a thread that has been marked ignored, select a message in the thread, right-click on it and again select Ignore Thread. ". But right-clicking the email (in the search results) shows NO such option.

What can I do? Thanks!

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