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So here is my problem. Why does TB have a "local folder" section, where I can create local folders to store say billing information, or keep receipts for car payments and the like. Then, I purchase a new computer to accommodate Windows 11, (DO NO get me started on that one!) So I reinstall TB, bring up my account, and of course NONE of my local folders are there! I've looked through the "Troubleshooting Help" and the "Open Folders" etc, but you have to talk to me like I'm a 5 year old! I'm not a computer dummy, but I'm not an expert either!

And the instructions don't make sense to me! I want my local folders back. I've spent a good amount of time creating those, and for a good reason. I can refer back to bills, I can help verify what I've paid and when, and I can back up bank statements and on and on! How do I retrieve these? There has to be a way right? Like with Gmail and the like. You should be able to get those items back....and it shouldn't take a bloody genius and com puter whiz to do this! I need a simple explanation as to how to retrieve these folders. Thank you in advance for anyone willing to help me with this problem.

Michael....

Sir, I request that pop-up option in firefox browser site not showing . Please it's option Enable and allow please because some side not supported because it pop-up blocked so Enable and allow please sir.

I HAVE TRIED TO FIND A STREAMLINED WAY TO DELETE MULTIPLE DUPLICATE BOOKMARKS (UNINTENTIONALLY CREATED BY AN OLDER FIREFOX BOOKMARKS IMPORT). BUT I HAVEN'T FOUND ANYTHING THAT WORKS. USING BOOKMARK MANAGER IS FAR TOO TEDIOUS AND TIME-CONSUMING. AND AN EXTENSION ADD-ON I TRIED CREATED EVEN MORE PROBLEMS. I NEED HELP!!

I am running Windows 11 on a Lenovo ThinkPad. For years, my firefox has opened to us.yahoo.com without a hitch. A day ago it started opening to that page once, then not again. It looks like it trying to do, but something blocks it and it ends up on a blank screen. I can get to yahoo if I then type in the address. I have checked and the home page is set correctly. I have refreshed Firefox several times. I uninstalled it, and re-installed it. It still opens to a blank page. I am running Windows standard security stuff.

Hello!

I recent upgraded my work computer to a new Mac mini. I reinstalled thunderbird but I am having issues with the drag and drop feature for email attachments.

Normally when I receive an attachment I am able to drag and drop the attachment to the folders on my desktop. This feature has not been working. I have tried doing this in troubleshoot mode and have had the same issue. I’ve also deleted thunderbird and reinstalled it with no luck.

I am on Thunderbird version 143.0.1 (64 bit) My MacOS version is Tahoe 26.0.1

Any suggestions on how to fix this issue would be amazing. Thank you!

My Spectrum password was changed and now I cannot get direct access to TB. For some reason TB is not linking up with Spectrum password. I get a popup panel saying "Login to server Mail.TWC.Com with username jomar159@hvc.rr.com failed" Retry Enter New password Cancel I have 2 accounts on TB 1 is wmarks1 and the other is jomar159@hvc.rr.com HELP

We have poor eyesight, so in vertical display mode, we could really benefit from having grid lines (at least horizontally) to visually distinguish each message. We have read various solutions on the Internet, but none seems to work at least not in dark theme mode, which is the default for a great many people with vision impairments (or just plain tired eyes). Perhaps some solutions that once worked have been uprooted, so to speak, during the course of Thunderbird updates.

We are used to having grid lines in Outlook (desktop). We are currently exploring switching to Thunderbird, but it needs to support our vision needs. For us, this capability is fundamental, not optional.

We are comfortable making config entries, creating and working in userChrome.css, and the like. We would be grateful for any guidance in this regard.

Thank you kindly!

I recently swapped to firefox and have had issues with my tabs crashing. There are days where a tab will repeatedly crash, or not at all. It always crashes on 1 tab. I've tried most of the suggested solutions, profiles change, addon troubleshooting, hardware acceleration, updating/reinstalling. Currently on windows 11.

Thunderbird Email - I am not receiving emails from my energy supplier (E.ON Next) - they say they bouncing. This started around Jan 25. I have spoken to them many time but no joy. E.ON receive emails I have sent to them and I am able to receive emails from just about anyone else eg shop, banks, contacts, etc etc . Can you help me fix this/explain why it is happening? Many thanks Jane

I have had Mozilla Thunderbird for many years and used it daily. Now you are writing to me that you want to close my mail program because I haven't used it for 2 years.

I have 2 email addresses linked to Mozilla Thunderbird: kurtj1942@hotmail.com and kurtj1942@gmail.com. I can receive emails from the Hotmail account, but I cannot send. From the Gmail account, I can both send and receive. Why can't I send from the Hotmail account?

Sincerely, Kurt Jørgensen

My e-mails are sorted from earliest (top) to the latest (bottom). Suddenly about 15 messages have gone out of order. Early ones have appeared towards the bottom (later ones, have appeared under those). Is there an easy way of moving them so they are all sequential?

Thanks

Hi, when i wrote an email, and i wont to attach a file from PC, when i select the file with extension .pdf, the file did not shown in preview pane. I try everything i think, but it wont work.

I'm trying to add accounts through the hosting provider Strato, but as soon as I add a new email, it asks for my name and email address, and I can only click "Next." Then it searches and searches, and I can't cancel without forcibly closing Thunderbird. How can I change this? Why can't I do it manually? Antivirus and firewall are already disabled... it doesn't help.

new 143.0.01

Hallo,

(new information at the end)

in an effort to understand why one s/mime signed message I received could not be verified by Thunderbird (140.3.0esr (64-bit) on Ubuntu 24.04.3 LTS) (error 1041, "unknown problems with this digital signature"), but by all other clients I and others could check (including cli tools openssl, cmsutil), I did a few tests using my own certificate (using rsaEncryption, SHA256).

Inital observation: Messages signed with "openssl smime -sign -in msg.txt -to <email> -from <my-email> -subject test -signer mycert.pem -inkey mykey.pem -out signed.eml" and opened in Thunderbird showed error 1041. Any modifiers like -crlfeol, -text, -binary, ... did not make a difference.

Omitting signed attributes (-noattr) however helped. The signature was verified.

Further investigations now showed that the reason for that is a mismatch of the signing time in the signed attributes block with the RFC 5322 date in the header (or a missing date, which is the reason, the openssl smime output is rejected). If there is no match, Thunderbird shows a 1041 error (unknown problems with the signature).

However, I'm wondering whether such a test a reasonable. The standards don’t instruct MUAs to compare signingTime to the RFC 5322 Date. Flagging a mismatch is not required by spec and in my opinion adds little to no security value. The RFC date header can be easily modified and the signing time is openly readable.

Does anyone knows why it has been decided to test that?

Good morning.

Problem 1. I've been using Thunderbird for a very long time. Everything has always been fine. But recently, I've been having trouble sending email from one of my accounts. When I try to send a message, a message appears: enter the password for the user... Entering the password doesn't help, and another message appears asking me to contact the network administrator. I contacted them, but they didn't find the cause of the problem, but they suggested changing the password, which I did, and reinstalling Thunderbird, which I didn't do for fear of losing all my email. Changing the password helped for maybe two weeks, and then the problem started all over again. The problem only affects one email address and only on one computer. Sending messages from that address on Android works without any problems.

Problem 2. I installed Thunderbird on my Android phone and encountered a problem when adding two accounts: the first installed without a problem, but I can't install the second one because every time I try, I get a message that the incoming mail server check failed - unknown error 42.

Problem 3. I'm trying to install the program on my second phone - it downloads 99% from the Google Play Store and that's it.

Is there any way to solve these problems, or should I change my email program? Best regards, Andrzej Witkowski

My Thunderbird calendar refuses to display dates in European format, namely day-month-year. I have read lots of helpful hints on the forums and tried everything, but nothing changes. My system is Ubuntu 25.04 with Cinnamon 6.4.8. Thunderbird version is 140.3.0esr (64-bit). Some of the suggestions refer to settings that are no longer there compared to earlier versions. For example, Settings > General > Language and Fonts has no format options. I have also used the config editor while TB was not running and added ntl.date_time.pattern_override.date_short and ntl.date_time.pattern_override.time_short, without any effect. Dates in the calendar still always appear in the illogical American month-day-year format. This is confusing, to say the least ! Has a solution been found to EASILY select the locale and formats that should be used? At the moment, the settings are under different menus and in different locations, and TB seems to be making it as difficult as possible to get these set - permanently ! - to the user's preference.