Thunderbird コミュニティフォーラム

Ever since the last update 157 when i open a conversation it open every single tab in that conversation and i hate that, cause i have to close every one to go to another email. this stupid updating thing is for the birds. Another thing that i really liked in past versions that whatever color tag i wanted to use would color the subject line now it just does a little symbol all the way on the right side. Can i uninstall a update by chance?

Thunderbird is difficult to maintain consistent operation.

Periodically, the font color changes without warning, and your settings options is very limited and or 'WELL' hidden.

Making it virtually impossible to find out how to change various screen graphical settings, such as 'font color' or 'font size', etc.

This is not the first time my font color has changed, and I can't find out how to reset the font color in the Calendar editor for any particular calendar event, either creating and or editing a change to the calendar event.

So please, provide me with an instruction on how to change the font color in ANY calendar event, via your Calendar editor.

My Calendar editor in the comments block is set currently with a black background and 'black' font color. So I cannot read a darn thing in the comments block. FYI, when currently using the mail editor, I have a white background with black text, working OK. But NOT the calendar editor.

After all these years, you would of thought Mozilla, either Firefox or Tbird, would have provided a good help dialogue on screen to inform users on how to do things like this. You either have done so and kept it a trade secret, and or have NOT improved upon your terrible user guide instructions.

Thanks in advance.

Since the Thunderbird update of 30 Sept the ability to attached files to my emails has 'vanished'. I press the attach 'button' but there is no response. Never had this as a problem before. I am running Windows 11 home version. Help!

Добрый день! В отправленных сообщениях пропали сообщения за последние два дня по адресу ak@ava.proekt.ru, как их восстановить?

For the last few months (several updates to Thunderbird) we are having a terrible time with our gmail accounts in Thunderbird. I am not that tech savvy, but so far nothing has worked (including a Thunderbird uninstall and reinstall). All server settings appear fine, and set to OAuth. We get random extra folders, random deleted folders, trouble with getting copies to sent mail (subscribe OK; have to go to Google's webmail site). This ONLY appears to be a problem with our iMac (M1 chip), and is not occurring with our Macbook Air (M2 chip). I've attempted a few other suggestions thrown up online, but I'm reluctant to tamper too much, and we are increasingly forced to rely on the Google webmail site for adequate function while on the iMac (again, MacBook Air is mostly OK).

Hi, I’m having an issue with the appearance of the right-hand side where my conversations are displayed. It looks like it has reverted to an older version of the interface. Sometimes it switches back to the newer, more modern design, but in this case it has stayed on the old layout.

How can I change it back to the newer, modern interface? I’ve already tried changing the theme and restarting several times, but the issue is still there.

Could you please help me fix this?

Thank you!

Thunderbird 157.0

Not a question - just a recommendation.

Wanted to install British English. Chose 'language pack' option, presuming that would include everything. But no dictionary was installed.

Tried again, choosing 'dictionary' (why two options, different files?) Correct dictionary installed.

Instructions should say "Do NOT install the language pack".

My setup is Windows 11 Home 24H2 on HP ENVY core i7 Thunderbird 64 bit ver 157.0 updated from 156.?? while chasing this issue. Some time after 08:00 EDT 9/28/26 Spectrum/Charter altered sign-in process, their tech support has been able to fix most customers by changing password on individual accounts. This does not seem to work for Thunderbird accounts. Any attempt to download from my roadrunner inbox attempts for over 60 seconds then fails. Attempts to send from my Thunderbird fails with SMTP server error 10060. Attempts to download from my roadrunner inbox fails with same error 10060 from POP server 47.43.26.4 on port 110 and port 995. I can still send/receive in my roadrunner Spectrum inbox. [redacted] @roadrunner.com, phone [redacted email and phone# from community support forum]

I'm running Thunderbird 157 64bit for Google email, Calendar & Tasks. This has worked nicely for months even after the upgrade to 157. Today Calendar & Tasks fail to connect and are completely blank. Apparently the Add-on 128.5.12 (Philipp Kewisch) that made this work has been disabled for some reason. Please don't tell me that Thunderbird has suddenly decided Google Calendar and Tasks just aren't needed by anyone anymore. There is no new connector available that I can find, just a suggestion to go back to an older version of Thunderbird? Please help me understand. Thanks!

Hi there.

I'm in Alberta, where we have recently changed timezones. Note that the CLOCK has not changed yet, as we are still before the date in November when we would "fall back". We were UTC-6 summer and UTC-7 winter. Windows called this "Mountain Time (USA and Canada), but now the "Mountain Time (Alberta)" timezone is in Windows after the 2026-09 Preview Update (KB5124010) (26300.9550).

When connecting to Shaw.ca's IMAP servers, the certificates that were valid prior to the Windows update are now reported as invalid. This has been confirmed across two separate PCs with different email accounts. The data for the certificate LOOKS valid (see screenshot) and is the same before and after the timezone change.

The failure occurred on the latest ESR release of Thunderbird, as well as 156.0 and 157.0 non-ESR.

Thanks :)

I used to be able to access the content in my folders and copy to paste to another action. Now all it does is enlarge the content and switch back and forth but won't copy.