Forum zhromadźenstwa Thunderbird

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.

With thunderbird this has just started.

I frequently send email that I have pasted part of an article from a news website. The pasted text is the standard black text. The bit pasted, when I look at my sent emails, has blue text.

All my comments on the bit pasted in my sent email are in the standard black text.

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

After your upgrade I was unable to send messages. The incoming I was able to fix but the outgoing I could not fix. I have included the email message sent to me and I have included a picture of the outgoing STMP,

Something seems to have changed recently with the PDF rendering in Thunderbird. I received an email with a PDF file attached. When I view it on the screen it looks fine, but when printing it out from within Thunderbird part of the top of the first page missing; it looks like part of the image is behind a white rectangle.

When I save the file and print it using Acrobat Reader it renders fine.

I don't know what to make of this behavior, but it does seem to be new and there is a difference between how the file is printed from Thunderbird as opposed to printing using Adobe Reader.

Thunderbird 152.0.1 on Windows 11 PC.

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.

Mail.com (and all its vanity domains like usa.com, europe.com, myself.com, etc.) & many such domains no longer work in Thunderbird. They used to

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

I recently (unwisely) refreshed my Windows 10. I had to relaod Thunderbird, but when I tried to reinstal my previous profile, I couldn't do so. I've tried using profile manager. but it only seems to recognise two of the six or so profiles that exist in my profile folder. This means I can't access several years' worth of emails - I need to access these for invoice and work purposes. What is really frustrating is that I can see the profile I need in the profile folder, and all the emails seem to in the Mail/popmail/Inbox folder (all with a much smaller MSF. file of the same name). I've tried importing the profile into Thunderbird, but that doesn't work, it just imports the mailbox with no subfolders. A responder called David has already kindly provided advice (many thanks, David), but unfortunately the solutions haven't worked. Can anybody help?

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.