Thunderbird Community Forum

Hello !

I'm using Thunderbird in the dark mode. When I open the detail of an event in the agenda, the text is still written in black, on a gray background so this is not really readable (cf linked screen shot)

At some points I had similar issue with mails, but I found the little button "toogle dark mode for mail" that allow to keep the dark mode for thuderbird but show the mail with white background and black text.

Is there a similar functionality for the agenda ?

Thanks !

I'm using Thunderbird on Ubuntu 24 and have some messages in some mailboxes that have lost their headers. I'm trying to fix them.

Early (1980's command line mail & mailx) mbox files were pure text with messages delimited by a blank line followed by a line starting with 'From ' (or possibly 'From: '). When I open a Thunderbird mbox file in 'vi' it is 'converted', or so it says. I'm wondering what this 'conversion' is and why it's needed.

Please could someone tell me what the strict rule that delimits messages in a Thunderbird mbox file is, and what is it that 'vi' cannot handle that requires 'conversion'?

Thanks

153.3.1esr (64-bit) Thunderbird Meadow Thunderbird Snap for Ubuntuubuntu-snap-build - 1.0

I have two different email accounts in Thunderbird. For the last few days, my Yahoo mail will not download. I can go to Yahoo, but prefer not to. My other account will download. I have just noticed that it seems to be downloading the same eight or nine emails over and over.

Thunderbird in Linux has worked perfectly for me for many year. This is my first ever problem with emails not downloading through Thunderbird.

What could be the problem?

Hello,

There is apparently a bug in the latest release of Thunderbird, which has broken the callbacks for Yahoo! IMAP email using OAuth. Potentially, it may actually be a problem with Yahoo!, and how https://api.login.yahoo.com is attempting to reopen Thunderbird after logging in, as the process has changed. I've already reverted back to the ESR Thunderbird channel once, but on a recent update the issue was reintroduced. Screenshots are included.

Thanks for any assistance.

Hello,

Is there a method to export my emails in EML format instead of Mbox without using third-party software? Are there any settings in the configuration editor that could change the default Mbox format?

Thank you

I was very frustrated that in 156.0.1 (157 as of today) on Arch there is no option to minimize to tray when closing. Now i do not know what is the cause of this, but i was unable to find any working solution ... FOR A PROBLEM SOLVED ~12 YEARS AGO >:(. Eventually resigned to system solution using SysTray-X which eventually worked.

               `ooo/                    OS: Arch Linux x86_64
             `+oooooo:                  Kernel: Linux 7.2.9-arch1-1
       ./ooosssso++osssssso+`           Desktop Environment: KDE Plasma 6.7.5
      .oossssso-````/ossssss+`          Window Manager: KWin (Wayland)

1) pacman -S systray-x 2) check plug-in in Thunderbird is present 3) change Thunderbird shortcuts to add env.variables "Exec=env MOZ_ENABLE_WAYLAND=0 GDK_BACKEND=x11 thunderbird %u"

I get your begging for money, you are obviously young, I have donated more money to you already than all my other email providers combined, period, you will allow me to move , remove as much as I want or I can delete you and you lose any future donations, but ticking me off with this we think this is junk crap trying to get more money from me only makes me want to DELETE YOU YOUNG PEOPLE, you act just like your buddy Google, lmk Anthony, or stop the bs

What do I have to do to get help in this Forum? This is the second time I've posted a Question seeking help, and yet again it is being ignored. Do I have join some secret clique or group? If so please tell me?

Due to issues with upgrading from Ubuntu 24.04.1 to 26.04.1, I decided to just start from scratch with a new clean install.

After finalising the install, I copied across my Thunderbird data to the new partition, merging directories as the data copied across. But, somewhere in the transfer I lost about the last two years emails, with only emails up until 12/24 being available.

There are a lot a important emails I need to recover, and I'm guessing they're still on my PC, in the old partition, and I desperately need help to recover them.

Thunderbird will not download mail. It sends this: "The certificate for inbound.att.net does not come from a trusted source." "Location: inbound.att.net:995" Then it sends the data with the certificate information. I am not a programmer, I do not understand what I am supposed to do to get it going again.

I'd like to resize an embedded image in an email. The bottom right handle is on the far right side. If I attempt to hover over the handle a scrollbar obscures the handle: it is not possible to grab it and resize the image.

How do I resize large images in Thunderbird emails?

As per title, if I have a large enough distn list I get a warning bar (see image) with The x recipients in To and Cc will see each other's address. You can avoid disclosing by using Bcc instead. Then two options, which appears to require a response. ( I haven't tested not acknowledging it and sending a blank email to one of my large lists as I don't want to appear incompetent to all my work colleagues)

This helpful warning is (emotively) treating me like an idiot. I am well aware of the 3 categories and I know how to use them. I don't need to be told each time and have to choose. I don't need a warning, if I stuff up that's my problem.

The issue for me is that recently I have started to use some larger distn lists so it's occurring too frequently.

Have searched but so far missed any option or config setting to disable this. Can anyone please advise how to do so, if it is possible.

This isn't asking for a debate on whether or not it's a good idea to warn people who don't understand email sending options (you can guess my view but each to their own). I'm simply asking is there a way to turn this behaviour off and stop TB from wasting my time requiring a response.

Thanks.

Good morning,

I am requesting assistance for a recent problem I have encountered sending attachments with email messages I am sending. There is no problem with sending the message itself. And have noticed no problems with receiving messages. When I attempt to send an attachment with a message I am sending, a click on the "attach" icon in the upper right-hand corner of the email screen, provides no response. I didn't notice a problem with this function in past weeks.

I appreciate your assistance. Thank you.

Tom Macciaro

I have installed Thunderbird on Linux on a chromebook. When I try to add my (gmail) email account in the Thunderbird account setup screen, it hangs up trying to authenticate the Google password for the gmail account. I have scrupulously checked and rechecked the password and the server details, and they are all correct. Why won't Thunderbird accept the password for my gmail account? Or is something else not right?

I upgraded my system to Kubuntu 26.04 LTS and started Thunderbird. The window where messages are listed was covered with Thundrbird presentation asking for donation. Only edge of one message is seen above the presentation and I cannot get to the list

Hi I am using TB 156.0 (64-bit) on Linux. I guess there was an update t TB and now when I reply or forward an email, the font size of the text is tiny. I also found that the font size for just viewing the body text of an email was tiny, but I was able to fix that. But for the font size in the body of a reply or forwarded email is tiny and I have gone thru all the settings for hours with no luck. Any help much appreciated.

For a few days I'm having trouble with Asana mails (notification mails informing me about replies, comments, etc).

Clicking on the mail to view it freezes Thunderbird for a good 5 seconds while one CPU core spins at 100%. This only happens with Asana mails (or at least I haven't found any other problematic senders).

I guess it's a problem with validation or parsing of the mail's HTML content. But I don't know how to debug this.

I can't pinpoint exactly when it started happening, but it was around the time I've switched to the [new snap release track](https://support.mozilla.org/en-US/kb/channel-choices-thunderbird-snap-and-flatpak#w_snap-channel-changes-in-2026). But since this happens with Snap and Flatpak I think the culprit may be the 153.0 update.

Things I've tried:

• Clearing cache and msf files.
• Troubleshooting mode with add-ons disabled.
• Reinstallation. Creating new profile + importing old data.
• Switching from Snap to Flatpak
• Switching Message Body display to Plan Text or Simple HTML.
• Disabling HW acceleration.
• Checking console for suspicious output.

Anything I can do to create handle the problem or collect information for a proper bug report?