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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

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

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

Thunderbird being used as IMAP client for Gmail - with no issues, until recently when an existing email recipient, who sits behind the Barracuda Networks system, fails to receive mail from Thunderbird's recent versions because it is rejected and blocked by Barracuda. I have tried using plain text formats and checked that SMTP server accounts are correct all to no avail, a 550 blocked is the result. The Thunderbird ver is 143 64 bit - However mail from an earlier 32 bit version 115.5 was successfully delivered, later 32 bit ver 140 failed to deliver through the Barracuda system.

Email from Google's own Web client gets delivered and mail from the Android mobile phone app likewise arrives. A simpler IMAP client (MailSpring) manages to get mail thru Barracuda so what has Thunderbird done to appear a threat to Barracuda ? BTW Mailspring is sort of 'Ok' - but it just isn't Thunderbird - it was installed only as a test vehicle !

when copying/pasting files from windows Explorer using the keyboard shortcut Ctrl+C/Ctrl+V in firefox, only the first file of the copied ones is inserted. there are no problems with other browsers (Google).

Not sure when I download Firefox to new PC ,How do settings I currently have in place transfer to new browser installation?

Also I have bookmarks on a memory card,Will they install to firefox by placing it in drive slot of my new windows11 machine?

I tried to use a ftp link setting firefox as the default ftp app, not realizing firefox no longer supports ftp. I am unable to reset the default app and can't find the setting to do so. I downloaded filezilla and wish to set it to be the default app for ftp. Can someone help me with this? Before anyone suggests it, resetting firefox to default settings is not an option.

I updated my firefox browser on October 6th and ever since then, whenever I press ALT to switch to a different application (I use ALT + Tab to switch windows) I go back in a tab's history. This never happened before and I'm not sure how to go about disabling whatever function this is. I've checked in the about:config section of firefox but I don't know which of these options is for this function, if it's even in here. Any advice or help would be appreciated!

It only happens on some websites (Wikipedia for one) and doesn't happen anywhere else in my system. I was unable to root out the reason for this and all solutions seem to be for when there are boxes instead. I don't see boxes, only Russian letters for some reason.

A disaster happened, but first, let me say that I had to create a new Thunderbird Profile because Thunderbird was acting really strange and also making my e-mails fail DKIM for some reason. After creating the new profile, things were working better, but still some problems. It's been several days. Twice it marked my own e-mails as Junk, and both times I marked them as Not Junk, but that didn't seem to "take".

An e-mail in my Drafts folder is my "in case of death" e-mail. I was editing it to change the To addresses, then told it to save as Draft. That immediate Draft went straight to the Junk folder. WTF? So I go to the Junk folder, select it, right click, and "Mark as Not Junk".

Instead of going to the Drafts folder, Thunderbird sent it. Not only that, the old Draft of the e-mail was sent also!

I'm royally pissed off! How could Thunderbird do something so stupid? First classify my own saved Draft as Junk after my having marked my own e-mails twice before as Not Junk, then send it when I said it was not Junk? This is stupid.

Needless to say, I had to hurriedly sent a retraction e-mail, then made phone calls.

Something is really wrong with Thunderbird Junk processing. After creating the new profile, I've seen junk e-mails sit in my Inbox for 15 minutes before suddenly Thunderbird decides that they are junk.

Thunderbird WAS a good program, but after having to start over with a new Profile, setting up my e-mail addresses again, install add-ins, go through all the settings again, import my e-mails, addresses, and calendars, then have things still going wrong, I'm wondering why I'm still using Thunderbird.

I'm a fairly heavy shortcuts user, and recently within the last couple weeks, they've stopped navigating to the intended page. When you click them the shortcuts and the iOS keyboard close, but the browser does not navigate. How can I fix this?

Mozzila не открывает предыдущую сессию, соответствующая галочка в настройках стоит. Я пробовал разные способы, указанные в часто задаваемых вопросах. В том числе с подменой данных в папке sessionstore-backups: запускал браузер - находил эту папку - вставлял нужный файл .jsonlz4 - перезапускал браузер. В таком случае все мои вкладке были на месте НО после закрытия-открытия браузера сессия снова сбрасывается. При очистке браузера, появлялась кнопка "восстановить предыдущие вкладки", восстановление происходило, НО закрыл-открыл браузер - и снова пусто. Пробовал удалить браузер и установить снова - та же проблема. После запуска, если открыть журнал - в разделе недавно закрытые вкладки, недавняя история поиска - пусто, как будто предыдущей сессии вообще не было. Как исправить эту проблему? Примечание - мои закладки, введённые пароли и расширения на месте.

I am having a problem with a 502 Bad Gateway error which will not go away. There was originally a real problem, but it has been cleared up. I am trying to access an e-book on Libby from my local library site when the error occurs. The link works without any problem in Microsoft Edge. It used to work in Firefox as well, until the temporary problem occurred. I have clear my Firefox cache, but this has not resolved the problem. Somewhere Firefox has stored something which is creating this spurious error, but I have been unable to find it. Any suggestions would be very much appreciated.

I've installed Thunderbird on new computer, and moved over from the old computer emails and Address Books (including customized ones). But when I start a new message, I can't get any e-addresses to appear in the To box.

What do I need to do to access Addresses?

I have an iMac and it will not log into our credit union's web site. When I goo to the log in and enter my password and such, and click on log in, nothing happens. I have a Mac Book Air with Firefox on it and it works fine. So does my wife's laptop. But my iMac doe snot work. I can use Safari to log in but not Firefox. Very annoying since I use Firefox all the time.

Running Firefox 140.3.1 ESR on Debian, lately I've been experiencing a bug when I have several instances of Firefox open, and multiple tabs open in each instance. After a few minutes of browsing and opening and closing tabs, I am unable to drag tabs to rearrange them (above the address bar). The "X" that is part of the tab also doesn't work to close the tab, and clicking the main "hamburger" menu icon (three horizontal lines) does not drop down the menu. If I switch to a different instance of Firefox that is already running, sometimes the "hamburger" menu icon starts working (sometimes not), and I am able to exit and restart Firefox, which works for awhile, and then a few minutes later the same thing happens again. Interestingly, when it's not working, I am still able to "right-click" on the tab and choose "close tab" from the drop-down menu.

I've been trying to discern a pattern, but have not been able to find a way to reliably reproduce the error. It often seems to happen when I'm using Reddit or Craigslist (maybe only more noticable because I often open and close a lot of tabs on those two sites). At one point I thought it might be related to opening a new tab for a site that had previously been opened in another Firefox window (instance), but that may be a false lead, because I haven't been able to find a way to consistently trigger the bug.

Thank you for maintaining the best privacy-respecting browser in the world, an indispensable tool for me.