All Products Community Forum

I'm in the process of cleaning up Thunderbird e-mail before moving to a new computer. I started with 11,593 e-mails in my Inbox and 7,799 e-mails in my Sent folder. I'm now down to 7,634 in my Inbox and 4,965 in my Sent folder. I've allocated 2 weeks for this process and found that it's taking me about 3 hours per day to meet my daily goals. I'm finding that I'm spending at LEAST half the time responding to "Empty-Trash/Compact-folders" requests. There are times I can delete 50 e-mails at a time without getting a request. Other times I will try to delete ten e-mails and get the request. With the old version of Thunderbird I could literally delete hundreds of e-mails at a time. Can you help? Russ Bukwa Yardley, PA ps. I have intentionally given you specific numbers. Based on my software- and test-engineering experience, I speculate you need to create a stress test to solve this nagging problem.

I do not and will not use the sidebar/vertical tabs features.

Unfortunately, it seems that firefox has decided to reactivate these features with an update? This is unacceptable. I do not want my settings to be altered with a software update. If firefox wants to tell me about a new feature, feel free to make a dialogue bubble pop up (once) asking if I'd like to explore said new features. Otherwise, please refrain from altering my preferred configuration without permission or notification. Doing so is completely asinine at best and shows open contempt for your customer base at worst.

I do not wish to give mozilla/firefox another opportunity to make my experience worse, thusly I ask: Is there anyway to entirely remove/disable the sidebar/vertical tabs feature from the browser so that it cannot be reactivated without the specific actions of the user?

I would like some help setting up my new Thunderbird app so that I can save emails to my computer and free up space in my Gmail account. I've tried twice to set up my default profile to an external drive instead of my "C "drive but I don't think it's working properly. Every time I change the profile it asks me to set up a new file like I'm starting all over again !! Also I would like to have it set up so that when I delete a file in Thunderbird it also deletes it from my Gmail inbox. I would greatly appreciate help with this. Thanks so much.

I previously successfully imported my configuration from Thunderbird desktop to my mobile app by scanning a QR code, and it worked perfectly. However, I recently had to reinstall my computer's operating system, which resulted in losing all my Thunderbird data. Now I'm trying to export the configuration from my mobile Thunderbird app back to the desktop version, but the export process generates a file with a .k9s extension. My question is: How can I import this .k9s file into my desktop Thunderbird installation? Any guidance on this would be greatly appreciated. Thank you!

We are trying to create an out-of-office response email and have found an issue. When creating the filter to respond with, the "Reply with template" option under "Perform these actions" is missing. We have checked the usual reasons why, but we cannot find what the problem is. We are using an Imap account. We have the 139.0.2 version of thunderbird, and we have set up the template necessary for the response without any issues. What could be the solution?

I can access addons.thunderbird.net with Firefox without any problems or being asked to "verify you are human by completing the action below.", yet when I try to access it from Thunderbird's add-ons manager, I am asked to complete the captcha, which after about 30 seconds of "Verifying you are human. This may take a few seconds." goes back to "verify you are human by completing the action below." I tried troubleshoot mode to no avail, I am not using a VPN or anything like that.

Hi. I play free sweepstakes and continually get messages that I am using an ad blocker. Need some help where to find the ad blocker so I can disable or remove it. Thanks

Hello, I have a problem with one email account. Grouping does not affect it. It does not group... Everything was OK but I changed the POP server address to MAIL for a moment and then back to POP. Since then the account has not grouped. I want to have all the mailboxes "received" together. What could be the reason that this one account does not group and it used to group?

I'm opted in to studies, but unable to toggle the switch to opt-out because it is "grayed out" (screenshot attached).

Cannot find any studies-related solution in existing community Q&A except for one that says to toggle the switch to opt out, which isn't an option for me.

Thanks in advance!

On various websites with embedded podcasts, when the file goes past 1h the volume 'slider' goes away and becomes a basic mute/unmute button. How can i force Firefox to always display the volume slider?

Onboarding with RSS subscriptions for a couple weeks and can't make any sense out of the folder hierarchy structure.

• UI's folder structure & the Subscription settings folder structure screenshots included.
• Folder A seems logically coherent: a "folder full of feeds". Single folder in UI. Multiple feeds (3) show up in the queue
• Folder B structure starts to become much more incoherent

   - Feed's are actually folders now. Sometimes.
       + Feed1 & Feed3 = folders. But UI 'folder' displays just the one feed, as if it was a feed.
       + Feed2 = folder, with the 'actual' feed within it. But then it displays in the exact same way as Feeds 1 and 3
   - seem to have contradictions running in both directions.
       + If they are feeds, is confusing they display with folder icon
       + Not clear why a feed-as-a-folder would display exactly the same as a feed-within-a-folder

• "feed7" situation I can't understand to be anything other than a bug.

   - Subscribed to the feed within folder C. It instead shows up in the UI in Folder B. 
       + Which bafflingly *only* includes feed7, and does not roll up or aggregate any of the feed/folders (whatever they are) within it.

Like the integration of having RSS within Thunderbird, but need some clarification. Docs (https://support.mozilla.org/en-US/kb/how-subscribe-news-feeds-and-blogs#w_folders-and-accounts) were not of use.

Thanks.

Mozilla's documentation on IMAP Synchronization Mozilla's documentation on IMAP Synchronization indicates

"Non-synchronized messages are still accessible within Thunderbird. The only difference is that rather than downloading the entire message, only the message "headers" are downloaded. (Message headers contain information like the sender, recipient(s), subject, etc - everything except the body of the message.) The message body is not downloaded until you click on the message in the message list"

Under what settings (e.g. Sync messages checked or unchecked) does this behavior apply?

Thanks.

I have 4 email accounts setup in Thunderbird. When I turn my laptop on and open the program all the email accounts automatically expand(open to show their folders). I then have scroll up thru all the accounts and folders to get back to the top account. If I don't shut down or reboot they will stay closed or go back to what state they were in when last closed. If I reboot or turn on pc again they all expand.

I shut down and boot many times a day when moving around the office or on calls. So it kinda annoys me and slows me down. I cant seem to find a setting that fixes this if it is even possible. I want them to stay closed till I open them.

When I receive some special html formatted email e.g. from ticket system like Zendesk they look like this: https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-17-01-06-32-c4ca42.png

When I want to reply to the text stays at the blue colored background and the text would be hard to read and it looks ugly: https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-17-01-06-37-c81e72.png

Unfortunately I can't change background color to blank or white in Tunderbird 139.0.2. In menu of reply window "Page colors and Background", "Use custom colors", "Background" I can set to #ffffff of course, click apply and ok, but that doesn't change it: https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2025-06-17-01-06-42-eccbc8.png

I suppose it relies to the html formatting of the received email because on starting to write a complete new email it works. But that's very annoying that Thunderbird doesn't manage to change background colors on already formatted html body. Is this a bug or only poor source code and the programmer didn't have much motivation to write and robust code which could gather all html emails?

Could you check with this test email to test and reproduce? https://limewire.com/d/pqbEk#1idjNje6b2

Thanks a lot! I'd be very happy about your help.

I am struggling trying to get a consistent format in Thunderbird. First of all let me say that I am happy with the default use of paragraph style and if I want to have occasional single spacing I can use shift-enter instead of enter. Most queries on formatting seem to be about getting single spacing all the time. That is not my issue. That means that if I compose an email from scratch everything is just the way I want it, using the default settings. The problem arises when I reply to an email. The settings then seem to be ignored. For instance the line spacing can be fixed to single spacing whether I select paragraph or body text and no matter what I do I can't get it to follow the default behaviour. Also, I noticed that the font goes to "sans-serifArial" instead of the usual "Variable Width". In fact if I try to select "Variable Width" in the Format menu it is just ignored. How do I get the default composition settings when I reply to an incoming email?

With some of the messages I receive and with film sites such as Netflix and HBO Max, the screen becomes too large to access the control column on the right, a necessary manuever as the scroll arrow has suddenly lost its ability to scroll when that column is no longer seen. What do I need to do to rectify this?

How do I enable the display of the number of selected feeds? I have all toolbars enabled, but as I select feeds in the navigation panel, I don't see the changing number anywhere. The context menu of selected feeds only has the following items:

1. Options
2. Open in New Tab
3. Open in New Window
4. Delete
5. Move To >
6. Copy To >
7. Compact
8. Mark Folder as Read