Thunderbird Community Forum

Na starten van Thunderbird volgt boodschap "kan niet worden geladen". Onderaan pagina staat boodschap: "Server imap-new.hccnet.nl opzoeken ..." Door mij is gecontroleerd of de specificaties van de beide e-mailadressen zijn gewijzigd. Dit is niet het geval. Via webmail.hccnet.nl kan ik nog email teksten lezen. Ook het geheugengebruik is geen probleem.

Om man gör fel vid skapandet av en mapp så att den hamnar på fel ställe i mapplistan är det svårt att rätta till. Om en mapp ligger fel i mapplistan och man skapar en ny mapp så kan den sorteras in i mapplistan i förhållande till den tidigare felplacerade mappen. Det borde finnas en knapp för att sortera alla mappar i bokstavsordning så att eventuellt felplacerade mappar hamnar rätt

Hi I tried to google this but as you can guess that was a exercise in futility.

So I installed thunderbird via flatpac as suggested by the main website

I went to account add a account entered my email and password.

Clicked continue twice setup filled in the info and got a error saying

Authentication error.

Unable to log in at server. Probably wrong configuration, username or password.

now i know both are correct as i logged in vai firefox and checked both excepted.

pic below best i can do dam thing wont let me set window size so it got cropped hopefully gives info needed

so I tried to google the settings of incoming and outgoing 4 out of 5 pages i found where set as the pc has set it.

at a loss now guys no clue what to do any help would be appreciated.

ty in advance.

recoverable? reportable? If too much trouble, say so and I can let it go. previously they were populated with titles and email content no relief after compressing folders, nor using safe mode. rlse: 153.1.0esr on Win10 home 22H2 19045.7663

My email works well most of the time. About three or four times a day now I get a message "The current command did not succeed. The mail server for account <account name> responded: System Error (Failure)." Nothing seems obviously wrong that I can see, maybe some of my recipients aren't getting the emails I send? The account in question is at gmail. I've been using it, and Thunderbird, for many years without seeing this error. It seems to have popped up in the last month or two and is now happening a few times a day. I'm running Windows 11 Pro 25H2 build 26200.9168, Thunderbird 153.0.3 Build ID 20260810194242. I have plenty of disk space (1.15TB free) and restarting my system hasn't helped. Is there a way to turn on more logging to get more information about these errors?

Additional details:

• Operating system: Windows (please specify your Windows version if known)
• The issue started on August 25, 2026.
• Thunderbird becomes unresponsive shortly after startup.
• A “System Integration” prompt appears before Thunderbird becomes unresponsive.
• I cannot click any buttons once Thunderbird becomes unresponsive.
• I tested both available profiles (“default” and “default-esr”) using the Profile Manager, but the same issue occurred with both profiles.
• I also started Thunderbird in Troubleshoot Mode with all add-ons disabled, but the issue still occurred.
• I can force-close Thunderbird through Windows when it becomes unresponsive.
• I have not deleted or modified any Thunderbird profile files because I want to avoid losing existing email data.
• The profile containing my email data appears to be “default-esr”.

I would appreciate any guidance on how to identify the cause of this issue and restore Thunderbird without losing my existing emails.

Guten Tag

Das E-Mail-Programm meldet immer „Passwort falsch“ oder GMX verweigert den Zugang? Komisch ist nur, dass es nur mit ihrem E-Mail-Programm so ist. Das Programm bekommt keinen Zugang, obwohl das Passwort ok ist. Alle Programme funktionieren, nur Ihres nicht. Auch eine Neuinstallation hat nicht geholfen. Seit heute kann ich keine E-Mail bei allen Konten mehr abrufen, da bei allen Konten die Passwörter falsch sein sollen?

Kai Ockenfuss

I have been using Thunderbird on my PC for years and when I got my last PC, I found a article to help me move my files. I am now looking for instructions on how to move my Thunderbird files from the PC to the Mac so I can continue using it as I have been.

Latest version of Windows 11 Thunderbird has stopped displaying the message body in the message pane ( right side of the screen) . I have another email client that displays the message body perfectly. It does display the message body of any messages save in a folder but will not display newly received messages in the pane. When I click on the message sometimes I get a white blank screen in the message body display pane. HELP!

You upgraded my program just shortly and now I cannot send email. Everything worked fine before the upgrade but now I can only receive emails. Please help and tell me what to do.

How can I see my emails , they haven’t come through since 13/08/2024 and I really need it. It’s a recovery email address that I need desperately. Other thunderbird accounts are ok.

It still sends emails fine

Today all my yahoo & aol accounts were locked (About 10) . I had to release all 10 of them before Thunderbird can receive emails on accounts that are not locked (other than hotmail , gmail etc). I am reasonably sure this is not a yahoo / aol issue (though I know they are owned by same company Verizon Media )

Because I have seen this problem in the past with other email domains . If hotmail or gmail is locked then I cannot receive any yahoo emails until I release all locks on hotmail or gmail etc accounts

I read somewhere it may be auth issue such as OAuth2 but all my my settings are correct to OAuth2

After updating to 153.0.1esr(aarch64). the SEND button has disappeared. There's no way to send an email. (I can receive emails.) I am a Mac mini M2 Pro. OS 26.4.1

I cannot find a link to download a previous release of Thuderbird, which was working fine until this update.

Thunderbird ver 115.18.0, on a Win7 machine, upgrading not an option

When opening Thunderbird I get a sign-in message, inserting my email address and clicking the next button I get the google error message.

In the last month or 2, when I delete an email it does not show in the trash folder. I can wait from 5 minutes to even the next time I reboot my puter to finally see it it trash. Sometimes it sends it to the all mail or important folder instead of trash. And if I delete from there, it still takes tons of time to end up in the trash folder...if it even gets there. This seems to be getting worse by the day. I have clicked repair folder, no change, I have cleared Thunderbird's cache, no change. It's also now taking way too much time to load an email that contains a picture. This happens with at least 3 of these gmails. I'm at a loss here and extremely frustrated and about to change these gmails from imap to pop. win10 and TB is up to date. But it doesn't compact folders as much as it used to either. Any help appreciated

I'm currently making a custom theme for Thunderbird for my own personal use. I've gotten pretty much everything how I want it to look – except the main content. I prefer light mode for accessibility, and currently it's stuck in dark mode everywhere (my settings menu, calendar, mailbox, etc).

The first image is how it currently looks, and the second is how I want it to look (the black boxes are there to block sensitive info). What would I need to add/edit in my manifest.json and/or style.css to get there?