Thunderbird Community Forum

I have Thunderbird installed on a desktop and laptop (both running Windows 11) and an Android phone. I can no longer receive emails on the two PCs, though the phone still works OK. Webmail works fine on all three devices. I have tried all the remedies I can find on the web, but so far without success. When I send a test email to myself it goes out OK and appears in my webmail, but does not appear in my Sent box. I tried doing Repair Folder on my desktop Inbox. This caused all the existing messages in the inbox to disappear, though the folder size still shows as 400Mb. I have a secondary email address which I use occasionally (a gmail address). This is still working OK. All help gratefully received. Alan

I have received emails from today, 10/21/26 but noted that emails from 10/19 and 1020 are missing, Can you please figure out why for me. I use Thunderbird/ Freedom. Thank you.

I deleted one of my emails accounts because it was hacked; I logged in to Ionos (hosting my email) and had to change my password; I changed the password but now I can't reinstall it; Authentication failed; FYI when I use the webmail using the new password, I can check my emails. Please help; Thank you.

I stopped getting e mails 9 days ago on Thunderbird. I found out that plusnet that used to have me had passed on to greenby. I can get onto greenby but i would prefer to be on Thunderbird because of my saved business e mails. Mike

Hi all!

Years back, I created my first account using POP3 when IMAP storage was expensive. Over the years I added many message filters to organize my tasks. Now I'd like to switch to IMAP and found everything I need, except for how to move/convert/copy my message filters. So my question is how can I transfer my message filters when recreating the account using IMAP? (I have a lot of filters, recreating them is no good option...)

I also noticed, that I have some filters for "Local Folders" and some for my POP3 account. Whats you're recommendation for that? Merge them into a single list assigned to the account? How can I do that?

Pauliman

I have Proton Mail, and Proton Bridge. It was working until Yesterday. Starting Yesterday, New emails would show up in the Web app, and the ProtonMail Desktop App, but would not make it to the Thunderbird Inbox. The first email that did this arrived at 1:30PM on 10/19. When a new email arrives, a new email windows notification will popup in the lower right hand corner. I checked Spam, and it is empty (I find this hard to believe). My phone also displays a new mail notification.

I know Thunderbird is receiving the emails. I can find the new emails by using "Quick Search", and searching for the email address of the sender of the new email. The results are completely without formatting, and do not indicate what folder they are in.

For example: I have a Gmail Account (redacted@Gmail.com), and I sent a test message to my ProtonMail address (redacted@Proton.me). That email contained the subject line "Ping 10/20" and it contained my auto signature. If enter "redacted@gmail.com" into the quick search, and I hit the return button, it only finds a message I sent about 7 weeks ago.

If I then click on the magnifying glass icon, a new tab opens up with the results. It displays the first 10 results of 54 results searching for "redacted@gmail.com". At the top of the results is my "Ping 10/20" test email. I could not find the folder name where my "Ping 10/20" test email is located on this results tab.

I see that the text "Ping 10/20" is a hyperlink, so I click it. The tab shows up, and strangely, it show the email and one reply. No reply was received by the Gmail account.

I have done troubleshooting of the ProtonMail bridge. The fact that the email is found somewhere in my thunderbird installation, I don't think ProtonMail Bridge is the issue.

When I click "extensions" under Tools > Add-ons and Themes, I get the following message:

Sorry, you have been blocked You are unable to access thunderbird.net

I.e. going from https://addons.thunderbird.net/en-US/thunderbird/search/ to https://addons.thunderbird.net/En-uS/thunderbird/extensions/

This happens in Thunderbird, Firefox and Vivaldi, both from my job or my home network (using NordVPN). Funnily search still works, so I suspect the link itself might be broken. Cloudflare tells me to contact the site owner, but they have made themselves incommunicado and refer me to community support who obviously aren't able to fix the problem!

(It is also disconcerting that Cloudflare asks me to enable cookies in Thunderbird, which is a huge privacy issue. However I get the same error in browsers with cookies enabled, so that is not the real issue here.)

Today when trying to send an email I get Sending of message failed. The mail server responded: Mailbox full. I use an Outlook address. I have emptied my trash, spam, and sent items folders along with moving many of the contents of my folders to the Local folders.

Is there a way to revert back from a Thunderbird update? I have my inbox with current emails, but my folder organization on the left is disorganized and contents are missing and many folders are missing. It's destroyed YEARS of work!

I tried the automated setting up - several times but get the error message below, I tried changing the authentication but same result.

I tried the Help here: https://support.mozilla.org/en-US/kb/thunderbird-and-hotmail - but it didn't help!

I have the settings it shows for Outlook - but it doesn't work! When I "Continue" I get Authentication error. Show less

"Unable to log in at server. Probably wrong configuration, username or password.". It hasn't asked for a password.

I can login in to Outlook webmail and receive messages. Please help. I'm not overly technical but not totally ignorant either! Thanks, Isobel

Was kann ich tun? Habe Probleme mit mozilla. Bei derAuführung der Programme Thunderbird ( ständig ) und Firefox ( manchmal ) kommt es zu Abstürzen wie Programm keine Rückmeldung, einfrieren so das keine Eingaben mehr möglich sind und ich jedesmal das Programm schließen und neu starten muß.

I cannot get Thunderbird to launch. It acts like it is stuck on perhaps one account and circles keep spinning as if it never can get a few of my tabbed emails open. It keeps saying it "isn't responding." Since this began happening a few days ago, I've stopped the Thunderbird task through Task Manager, I've shutdown and restarted my whole system multiple times, I've updated to the latest Windows platform and made sure my drivers were all up to date... I can't update my thunderbird (if required) because I can't get in in the first place. I have hundreds of emails in multiple accounts under my current Thunderbird. I can't afford to lose all that history. I don't know which version I'm using because, again, I can't get the desktop app to launch. What do I do?

Hi there, I have several email accounts I use Tbird to manage. One of those is a hotmail account. I have the settings setup correctly for IMAP synchronization. But, after the initial pull of messages, the connection to the server seems to fail? For example, I open tbird, it pulls in new messages, run filters, etc... If I come back and try to reply to a message, the outgoing server will timeout (if you test the outgoing server in settings, it connects. If you reply as soon as you open tbird, it will send a message from that outlook account). I believe this issue is more than just the outgoing server. For example, if I move an email to a different folder, it won't register the move until I reopen tbird? Similarly, sometimes if I try to open a message after tbird has been running for a while, the message will not open/fail to load.

These issues seem to be impacting only this outlook account. I'm really not sure where to go with troubleshooting and looking for guidance.

much thanks, Ryan

Thunderbird is installed on an iMac Retina 5K, 27" 2019 computer running macOS 15.7.6, but just this week, when it starts, it only opens a window with tabs and does not finish opening the app. The window shows the tabs, but they just have a bouncing dot from right to left, and anywhere I move the mouse on the window's control bar, I get a swirling color wheel. I restarted the Mac (no change), deleted the app and downloaded a new one, and nothing changed. Force Quit says it's 'not responding'. What do I do next?