Diễn đàn hỗ trợ Thunderbird

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.

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 am using Linux Mint and Thunderbird v140ESR.

I have searched the knowledgebase here to find out how to add an attachment to an email. All the screenshots are for the Windows version, even though I have selected my version from the selector on the RHS:

https://support.mozilla.org/en-US/kb/how-use-attachments#thunderbird:linux:tb140-esr

Any advice gratefully received.

Most file attachments I receive open the correct program by file type. that does not happen for docx. Can I establish that default? If not, I have to save to tile system which will correctly handle the connection, but is not a desirable workflow.

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.

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.

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 T-Bird sends a message with an in-content photo, is that photo compressed to save space and transmission time?

I converted from Eudora. Eudora would compress in-content photos to save space and transmission time.

If T-Bird performs a similar action, is that compressed file saved somewhere?

Whenever I open Thunderbird on my desktop, I get a message that "FileLink Provider from WEBDAV is not properly configured," or something like that (hard to write it down when it just flashes on the screen for a few seconds!).

I have no idea what that means. I may have used FileLink in the dim dark past, but I don't recall what it's even for, let alone what to do about this error message, if anything.

Shall I just ignore it, or is there something I should do to resolve the matter? Thanks!

Hi there, Just installed Thunderbird email. Before uninstalling Outlook 2016, I tried to forward some messages to Thunderbird, but Thunderbird will not show emabedded images or attached photos, regardless of format (JPG, WEBP or PNG) Example: Instead of the image embedded in the email, I got this: g:20260201194950ee722ec300f042669bef9585ca10p0eu&R=1KSFSC960P76L&T=O&U=https %3A%2F%2Fimages-eu.ssl-images-amazon.com%2Fimages%2FG%2F01%2Fnav%2Ftransp.gi f&H=8QFJAA9HOQ1LXLAKNXLPWFHXGSSA&ref_=pe_109088481_1104238771_opens>

I have Original HTML in Thunderbird settings, not changed anything. How do I resolve this? I appreciate your help

docx and xlsx attached files don't open with I click on them. I want them to open in Word and Excel. Nothing happens. I have to save them to my Desktop and then I can open them.

doc and xls attached files open when I click on them.

I can't find any associations in "files and attachments". 

I'm using version 140.7.0esr (64-bit)

I am running Thunderbird version 128.11.0esr (64 bits) on Windows 10 Pro. I have defined, in Windows, the default program for .doc and .docx files to be LibreOffice Writer and this works fine when I click on such a file in Windows.

But when I got a docx attachment in a Thunderbird email, and clicked on it, nothing happened. When I right-click on it, it just offers to open (not to select which program to open it with). I have to save the file locally, and click on it in Windows in order to open it.

This is very frustrating, all the more so that it used to work. I tried adding the two following lines to the prefs.js file, to no avail - no change:

user_pref("network.mime-handler.external.application/vnd.openxmlformats-officedocument.wordprocessingml.document", "D:\\Program Files\\LibreOffice\\program\\swriter.exe"); user_pref("network.mime-handler.external.application/vnd.openxmlformats-officedocument.wordprocessingml.document.useSystemDefault", false);

Any suggestions? Thanks!

pLEASE HELP IN VERY SIMPLE LANGUAGE .tHANKYOU SO MUCH. ATTACHMENTS TO EMAILS WON'T OPEN. ERROR MESSAGE1765572973244 addons.xpi WARN Checking C:\Program Files\Mozilla Thunderbird\distribution\extensions for addons Uncaught NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIMsgMessageService.messageURIToMsgHdr]

   displayMessage chrome://messenger/content/aboutMessage.js:269
   openTab chrome://messenger/content/mailTabs.js:305
   _cloneTemplate chrome://messenger/content/mailTabs.js:52

aboutMessage.js:269 1765573033678 Toolkit.Telemetry WARN TelemetryStorage::_scanArchive - have seen this id before: 2790b244-a901-47db-9540-2583dbddbb49, overwrite: false

I cannot open attachments directly in an email with a double click, Probably since a week or so back. I have to copy the link address and insert it into a web reader. There is no command in the settings as I can see Quite a nuisance, Best regards, Gustaf

I see that any emails I sent using my outlook/microsoft account, two copies of that sent emails get generated under 'sent' folder when it should just be one so each time I have manually delete one copy. I have not seen this issue with other providers like Gmail, Yahoo or iCloud (Apple).

The other issue is which I have only started having today is that when I am trying to attach files the dialog box from which I can select the files open briefly for like 2 seconds (with no contents visible) and then disappears.

I was in the process of searching my files to attach one to an email when the attachment window suddenly expanded from approx 50% of the screen to almost full screen and I can find no way to reset it. I can see the sideand bottom edges of the window, and move the expand/contract arrow on the cursor to these sides and the bottom corners, but it does not operate, and there is no button to minimise or adjust it. I have just checked and it is operating perfectly fine on both Firefox and the main Thunderbird window, and email viewing windows. Is this a change to the program settings - it appears to only apply to the "Attach" setting - viewing attachments and emails are as they always were.