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Bei manchen PDF Dateien 2,7 MB bekomme ich die Fehlermeldung Datei beschädigt. im Originalpostfach ( t- online ) Zugang über Internet ist der Anhang ok. Wenn ich die Datei vom Server direkt ( z.B. t-online nochmals an meine E- Mail Adresse sende und dann über mein Thunderbirth Mailprogramm öffne, ist die Datei ok. Der selbe Effekt tritt auch auf meinem Lapptop mit Linux Betriebssystem auf. Was kann die Ursache sein?

With 03.04.2026 they began to notice that the attached emails in eml format (the attached emails have attached documents, mostly pdf) sent from yandex mail stopped opening. Everything used to open well. Eml also does not save to disk. If you send the same files via Gmail, everything opens. Program version 150.0.1

I can't open an email attachment with last part rs6.net. This is a reliable email with important information I need for a church conference.

I tried to send something and Thunderbird blocked it with yellow box on the bottom i could not d find out where or how to remove or unblock t and i also get it in Drafts too but how do i remove in Thunderbird please tell me where and how to unblock attachment remove the yellow box to unlock something please

something about remote content  i think

Hello dear support team Some e-mails in the Inbox are of a huge size, like 32 MB and more, even without attachment. I already used repair function, but it stays the same. In Outlook, the same email is of normal size (80 kb). So, it is not the e-mail provider or the database at the provider. I have had this situation throughout several updates, so it is not specific to a certain update. The ones that have an attachment and the same problem (attachments of less than 1GB but show 42 GB) cannot be moved. The error dialog says: to big to move. Also, the attachments cannot be removed as they show 0 kb and the attachments name is crossed out. This is not true for all mails, but some have this problem. What do you recommend?

I receive emails from one source that's supposed to have a banner image at the top. In Thunderbird it shows the broken image icon and the image as an attachment. But in RoundCube it shows as expected.

The html shows:

The image part of the email shows: content-id: <piXdKIOofB>

I'm guessing that those angle brackets around `content-id` are breaking the display, such that it's calling that a mis-match.

Name Thunderbird Version 140.9.1esr Build ID 20260404050724

I received an email with several jpg images attached. I click on them to open in MS Office Picture Manager, and all I get is a tiny box with a red X. I have tried several online help resolutions, yet no resolve.

Hi everyone,

I’m new to Thunderbird. I’m using version 149.0.2 (aarch64), and I’ve noticed that when I receive one or more attachments, I only see a file called winmail.dat.

Is there a way to view the actual attachments, whether they are PDFs or other file types? Thank you!

Today the pictures,jpg, stopped opening automatically in Thunderbird mobile. Now there is a View link and its just not good to have to go through the extra steps to see the pictures. It must be an update that broke it because my settings didn't change. Also, It would be helpfull to see date and time of messages instead of day of the week.

Hi, The goal is download attachments from a RSS feed. I set a specific folder so i don't have to select path for every single file. Then clicking on the file link and it should start to download but it is very unreliable especially when used on many files in sequence it silently fails. Related big problem is absence on any useful file transfer indicator like Firefox has. There is a "download manager" tab but it is completely useless. It does not show any progress and the view has no scroll bar so nothing useful can actually be seen there. Downloading using "save as" button works. So you should either fix the direct link download or disable the feature completely until it does work, to avid missing files, because that is the worst outcome.

Не отправляются письма с вложениями с Thrunderbird с данных почт mng326@anepmetall.ru mng323@anepmetall.ru 209@anepmetall.ru 204@anepmetall.ru 201@anepmetall.ru 205@anepmetall.ru 220@anepmetall.ru 218@anepmetall.ru 206@anepmetall.ru 208@anepmetall.ru 217@anepmetall.ru 215@anepmetall.ru mng314@anepmetall.ru 211@anepmetall.ru 202@anepmetall.ru 210@anepmetall.ru 214@anepmetall.ru buh-krsk@anepmetall.ru 212@anepmetall.ru 207@anepmetall.ru проблема массовая. С других сервисов письма отправляются нормально. Подскажите в чем проблема?

In den Vorschaufenstern sind in Thunderbird seit Kurzem keine Anhänge mehr zu sehen. Habe ich unbewusst eine falsche Einstellung vorgenommen? Habe alles versucht, keine Lösung erhalten.

When I type the word "attachment" in version 149.0.2 I no longer get the warning bar across the bottom of the screen. I do have the "check for missing attachments" box checked in Settings.

I am working on a new laptop running Windows 11. Thunderbird was successfully installed a week ago and was running fine until I made a change related to OneDrive - attempting to remove OneDrive as a default location for files. later, I attempted to open an MS Word attachment to an email and got this message from Microsoft Word: "Unable to open the existing file: (C:\Users\..(myname)..\AppData..\Normal.dotm)".

I think my OneDrive action - removing a OneDrive folder from my C:/Users/..(name)../ location on my laptop - per Windows support directions, caused this. Maybe a disconnect between Thunderbird and MS Word? I can open other file types that are attachments.

Can you help explain and correct this problem?

Thanks

Knowing that an email message should be kept below the size of 25MB, I was trying to make my attachments smaller than that. Yet when I was sending a message with no text and 1 attachment the size of 21.5MB, I got a warning that I was trying to send a message the size of 29.4MB. Where does this come from?

When composing an email and adding an attachment, the file type icon does not appear next to the file name of the attachment. I located this thread: https://support.mozilla.org/en-US/questions/1547712 which seemed to address this and someone hit on the issue--file names that have a space in the name--test file.pdf for example generate the problem. When attaching a file with no spaces in the name, the icon appears. Any further info on this? Windows 11 personal. Thunderbird v. 149.0.2 (64-bit)

Thanks

T-Bird,

Using the latest version of Thunderbird, all of the sudden I cannot attach/send photos or documents. The 'send to' mail icon in the menu is not lit up to accept the attachment. The message come back 'no file associated'. My defaults are as they were. I have been using Thunderbird email client for likely twenty years. What has changed and how can I get my Windows 11 to recognize again? Would reloading the program help? Any information/help would be much appreciated as I am not a system dive in file changing techie. Thanks, Doug

Ich benutze Firefox auf zwei Windows 11 Rechnern. Die Version ist auf beiden Rechnern gleich, (149.9 esr 32Bit ) , beide Rechner greifen im Fall des Verfassens einer E-Mails mit Anhängen auf einen gemeinsamen Speicher über LAN zu, seit kurzem gibt es bei einem der beiden Rechner aber beim Anhängen einer Datei an die Mail eine Verzögerung von ca. 5 Sekunden, bevor der Anhang auftaucht, unabhängig von dessen Größe. ( Also auch kleine Pdf´s werden verzögert angezeigt.) Der zweite Rechner hat das Problem nicht, selbst bei grösseren Anhängen. ( Auch sind die Rechner fast bau-und ausstattungsgleich ) Testprogramme auf dem Problem-PC zeigen keine Auffälligkeiten beim Schreiben und Lesen, auch die Internet-Verbindung ist die gleiche... Habe bereits die Einstellungen der Konten und des Programms in beiden Rechnern verglichen, sie sind gleich. Hat jemand eine Idee, woran das liegen kann?

Grüsse, Martin

Hi:)

I am unable to retrieve an already downloaded email (with attachments) from my INBOX to RECEIVED IMPORTANT MAILS.

All other mails (without attachments) can be clearly seen in the RECEIVED IMPORTANT MAILS folder but the ones with Attachments (irrespective of the size of the attachments) do not show.

I can see that email with attachments in my Thunderbird INBOX but the moment i move those mails to the Folder: RECEIVED IMPORTANT MAILS, it doesn't show. This issue, however, is not there on my other systems that also have Thunderbird installed but on my WINDOWS 11 laptop. I am using Version 149.0.1 (64 bit). Is it a storage issue because this particular issue has been cropping up only since March 28th.

Looking forward to your help!

Thanks and regards, Nauman