Thunderbird Community Forum

PDF file attachments were working fine and now they don't.

I get no error message, but nothing happens when it's set to open in Acrobat. I can view the file in "Preview in Thunderbird" and the file isn't corrupted as I can save to disk and then open in Acrobat.

I tried restarting TB in troubleshoot mode with add-ons disabled, but that did not solve.

Thanks for help!

My email works at first, then after a while it says incorrect password and asks for my password. I enter the correct password (100% correct) and it says wrong password, and it won't work again until I start the computer next time and enter my password. (it works, downloads my email, then after a while it all repeats) Thunderbird. (recent download) Windows 11.

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both the automatic and the manual configurations failed. The new account receives mail, but the outgoing smtp server config seems to have a problem. Sending messages times out or keeps prompting for a new password.

The Hotmail account has POP3 and IMAP enabled. Thunderbird is set to receive all cookies. I cleared history and cache after every attempt and also temporarily disabled the firewall.

Any suggestions about what the problem could be?

Hi folks. Suddenly I am having a problem with my e-mail account. I was working with T’bird this morning without any problems. Then I went to open my Firefox browser and I got a message that it wanted to upgrade to the latest version, which I did.

Now suddenly T’bird isn’t working. I got the message “ Enter credentials for (me) on smtp.gmail.com”. It has given me a Sign in page. My e-mail address was populated. Clicked on Next and got a message from Google “400. That’s an error. The server cannot process the request because it is malformed. It should not be retried. That’s all we know”

I haven’t made any changes to T’bird. My smtp is still the same. I have just looked at my Gmail on my iPad and the only thing I notice is on the menu list there is a link to ‘upgrade’ - I am not risking that yet!

Any suggestions?

Hello, For the past month unknown to me, all mail that I have sent or replied to has not reached it's destination and I cannot figure it out.

Using Thunderbird desktop, (up to date). Any mail I send appears to send, (status shows sending, loading bar, sent, saved to sent folder) but the mail is not actually sent, doesn't appear in the web mail history, doesn't appear in thunderbird as a draft, sent, or anything... BUT if i search for the mail, I get a search result of the mail showing a sent date, but i cannot actually locate the mail in any folder, and i do not know how to view the message properties to see where it is saved to.

I have triple checked the server settings, I can read, get new mail, and see sent mail sent from the web, but nothing about mail sent via thunderbird. I have deleted and re entered the server settings, I have cleared thunderbird cache, repaired the folder, tried troubleshooting mode, and just can't find any errors or anything signaling a problem.

Mail server is a web domain. No issues using roundcube.

My provider changed from q.com email to myctl.net email. I was using outlook but it wasn't downloading new emails. They are on provider web mail. When I downloaded Thunderbird it asked about importing from Outlook and I did. Now it is trying to download the 36,000 emails on the server site and going very slowly and I can't open the ones it has downloaded, I think because it was sent to q.com. Can i uninstall Thunderbird and then set it up again without importing anything?

I installed Thunderbird 149.0 on Linux Mint 22.2 and I can't figure out if it's a release or a beta. On the downloads page, the "Release" section lists 148.0.1. The "Beta" section lists 149.0b4. The "Help - About Thunderbird Beta" window says "Release notes." I'm confused: what are these?

I have Thunderbird Version 140.8.1esr | Released March 10, 2026 on windows 11. The problem started 2 days ago when I couldn't receive emails on desk top or the iPhone. I looked on the web to see why I wasn't getting mail on my @yahoo.com mail. The web showed that yahoo had trouble in the eastern US. Not knowing what to do I deleted the email on my iPhone and tried to reinstall it, but couldn't. I didn't have the email password. (The one I had saved wasn't accepted.) I don't know how I got email back on the desk top, but it is working now. I think if I can change the email password on the desk top I can then reinstall it on the iPhone. On another computer on the same WiFi which has a g-mail address also using Thunderbird there was no problem getting mail.

I recently transferred to a new Win 11 system. I copied the profiles over and all my address book and settings are working. I have found that my calendars are not. I have three sub-calendars attached to my Home calendar, one was downloaded "USHolidays" and is working, the other two I created and are grayed out. The hover message says they are "momentarily not available." How do I fix this so they appear?

I have been using Thunderbird for ages now with no problem, but I suddenly realised that no recent emails were appearing from my Gmail account. I have tried everything suggested on line to resolve the problem, including uninstalling and reinstalling Thunderbird, and deleting and re-entering my acccount details but neither the IMAP or SMTP servers will connect to Gmail. I have reset all of the server settings on Thunderbird, and have checked that Gmail is IMAP compliant (which, apparently, is is now automatically). I have spent hours trying to sort this out and am just at the point of abandoning Thunderbird completely, but I am loathe to do so if there is a solution. The latest error message i have received is "Unable to log in at server. Probably wrong configuration, username or password" but I don't know what else I can check or change.

I encountered the following problem while using Thunderbird 140.8.1esr (64-bit): While moving an email from the "Inbox" folder to an archived folder named "2026", I noticed that the archived folder had disappeared! All my searches for a solution have been unsuccessful. Do you have any suggestions? Sincerely.

Bonjour, Les mails n'arrivent plus automatiquement dans ma boite mils et quand ils arrivent ils ne s'ouvrent pas (ou alors 2 jours après...). Message : le certificat pour imap.gmail.com.993 ne provient pas d'une source sûre ! La fenêtre "Ajout d'une exception de sécurité" s'ouvre et rien ne fonctionne si je clique sur "obtenir le certificat" ou "confirmer l'exception de sécurité"....J'ai tout testé sur cette fenêtre... Je ne suis pas du tout informaticien... Pouvez-vous m'aider rapidement ? Merci. TAMINIAU Yvan yvan.taminiau@gmail.com

The user who found she could not run the new version was the user who installed the update. She returned to the previous version (which runs OK). As before the update, server access was via Pop. However her Sent and Local Folders did not appear at all on return to the earlier version and her Inbox now contained only a few recent emails from this year and emails from several earlier years was missing. She set up a second account using Imap in order to be able to retrieve all her incoming mail from the Virgin server but is still without sent mail and her local folders.

Is there any way to retrieve the missing data and to combine the IMap and Pop accounts into one?

We have asked this before, and we still are not able to resolve it at all. Several items: We have two email addresses used by Thunderbird, for many years. [email1]@apaltd.com and [email2]@apaltd.com. Since the last "update", some many months back, her account has had TWO "sent" items/boxes, and they do not have the same items in them as "Sent". We tried to get rid of one, but to no avail. Also, the headings used to have features that showed "dates" in order and other normal things that we used all the time. Now these are gone and we have no idea how to get then back to way to the way opening page was originally, and we are seriously thinking about how to use another service, however we have been happy Thunderbird users for many, many years and need to return the site to its original layout. You folks have tried to help before, but none of the advice worked (i.e, right click on one of the sent boxes to remove it) We are reluctant to simply re-install Thunderbird lest we lose all our other data. We are at a standstill and need advice and help as soon as anyone can help. If any more information is needed, we will happily supply it. Thanking the community in advance for any help/solutions. Charles and Penny Kindt

Message sent has red texts (all containing an hyperlink). When vizualized in Thunderbird they all appear in blue. When vizualized in Gmail they appear in red! Texts written in red in Thunderbird messages still appear in black in draft's message!

I’ve tried all versions of Thunderbird on my 2020 M1 Mac, and even though I log in correctly, it doesn’t load emails from my account. I used to use Thunderbird normally because I needed it, but I haven’t used it for two months, and now I see that it doesn’t work when I try to connect to my email. It connects to my email normally, but the problem is that when I click on “Inbox,” there's nothing there, and when I click “Fetch Mail” to try loading it again, a message pops up at the bottom saying everything is fine, but in the end, I still don't have those emails. What kind of error is this?

Hello and thank you! When I print emails on our A4 (210x297mm) paper, to which the printer dialog is set, only the bottom half of the header, and top half of the footer, are printed, at the very edges of the paper. This doesn't 'feel' like a printer setting, but more of a Thunderbird setting, for if I set the paper size to US Letter, the footer prints 15mm from the bottom, but still only the top half of the text appears (truncated at the waist). Can you help?

My email was originally set up with Brighthouse which was acquired by Spectrum. My email address has a cfl.rr.com extension. Because of a hard disk problem, I had to reload Thunderbird. Spectrum is still maintaining the old Brighthouse accounts but support is extremely limited.

I can now get into my account in Spectrum's email and can send and receive email there. I had to use a password I set up for Spectrum to do that. But Thunderbird will not recognize my cfl.rr.com account. I can import that account into Outlook and Gmail, but not Thunderbird. It appears to me that Thunderbird is looking for a password that Outlook and Gmail don't require. If I had an old Thunderbird or cfl.rr.com password I have lost it.

I prefer Thunderbird, and I need to get my address book and history files back. I have just set up a new email account in Gmail and imported it into Thunderbird. Is there a way I can I recover my old address book and history files? I do have all the old Thunderbird files that I backed up before I had to reload Thunderbird.

Hi, I'm tring to rearrange the order of my email accounts in the left hand pane. The FAQ says sandwich icon -> account settings -> move them around in the desired order. This looks OK in the account settings list when I do that, but when I close it, the accounts order is as before, and this order shows up again when I re-open the account settings list. Is there any way to make this "stick"? Do I need to click some hidden Confirm button? Many thanks in advance!