Thunderbird Community Forum

hello, i cannot seem to find a solution online, hopefully someone can help.

i often receive emails with images attached, and most of the time people don't resize their images. you can imagine over time this all adds up in the email storage folder total size.

i dont always need to keep a 6mb image version, it can be reduced after i am done.

i would like a method to resize the received emails image attachment, to at least still have a smaller copy for refence, but not end up with a huge thunderbird email account profile (in the email received not externally saved)

preferably a one click solution, or even a routine i can run on the file system, etc. or some way to edit the received email and its attachment in program.

thanks

I am running Thunderbird 140.13.0esr (64-bit) in Windows 11 25H2. I received an e-mail message that has a JPEG attachment. When I open the attachment, the image is opened with the MS Photo app. But in that app I cannot rotate the image. If I save the attachment on my disk and then open it with the MS Photo app, I am able to rotate the image. I am wondering why the instance of the Photo app invoked by Thunderbird does not allow rotation. Note that in the -Thunderbird uploaded image, the rotate icon at the top left is greyed out (and not available). Thanks.

When I get an attachment as a reply in an email it is with tmp file name. It cannot be opened because Thumberfird does not have a file association program, Using libre office with here I cannot find a file association either. Hoping for some help. Thanks in advance. PS. Should the questions be asked in English?

My emails that I send usually have the same attachments, but sometimes the emails are returned to me undelivered for various reasons, but I have realised that in some cases it's because 2 of my docs (although in PDF) don't want to go through unless I send them separately. Is there a way of increasing the size of attachments I can send?

When I trash an email, I can no longer view the attachments in the trash file, though the email itself remains until the setting for trash deletion has been reached. Since I have a gmail email address I can still view the attachments via the website for gmail. Does the attachment disappear on Thunderbird because of a setting - or is this a "feature" of Thunderbird?

Where does Thunderbird put attachments that I open (say a PDF I opened)? Sometimes these documents are sensitive and I want to assure any temporary copies are deleted, either manually but preferably automatically

Will setting "browser.helperApps.deleteTempFileOnExit" to "True" help?

Thank you.

Hello, I have a problem. I'm a Thunder Birth email client user. Until now, the default program for opening PDF files was Adobe Acrobat Reader. I was forced to delete it and replace it with Foxid PDF Editor. I changed the default PDF opening programs in Thunder Birth settings, see attachment number 1. Unfortunately, when composing a new message, I'm having trouble viewing PDF attachments. See attachment number 2. Please help.

Since Thunderbird update to Snap ``` 140.12.1esr (64-Bit) Mozilla Thunderbird Snap for Ubuntu ubuntu-snap-build - 1.0 ``` opening attachments ceased to work. What does NOT work (any more):

• Move mouse over attachment → right mouse → open (nothing happens)
• Move mouse over attachment → right mouse → open with (doesn't exist)
• Move mouse over attachment → doubleclick (nothing happens)
• Settings → Attachments → There is an empty box, and in the void beneath it, floating in empty space the text (backtranslated from DE): "Add a Filelink-memory service" or "Filelink-save service" or similar. The text is dead (not clickable), same for the empty box.

AFAIR, in the good old non-snap TB version, the box had file extensions and linked applications to open them. The box / links / extensions coud be added, edited, removed. But in snap crap it's all dead...

Any hints what I am missing?

I used to open attachments from received mails (like .diff, .patch), and also used it for final inspection of own attachments while composing mails.

Sometimes, the following message opos up: /run/user/1000/doc/1d06e601/binutils-sort-text.diff konnte nicht geöffnet werden, weil die damit verknüpfte Hilfsanwendung nicht existiert. Ändern Sie die Verknüpfung in Ihren Einstellungen.

When I try to forward email with attachment. I get a error message stating I dont have access for the attached file so every time I have to remove the attachment in the email and download the attachment from original email and attach to my email. Which is frustrating and time consuming process.

What I thick is there is storage path issue with my email setup.

Please assist to resolve this issue.

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 an issue when trying to forward an email that contains an attachment. I receive the following error message:

"Sending of the message failed. There was an error attaching the file. Please check that you have access to the file."

I am using Thunderbird version 152 on Windows 10 Pro.

This issue only occurs when forwarding emails with attachments. Other email functions appear to work normally. Has anyone else encountered this issue? I would appreciate any help or suggestions. Thank you in advance.

Thunderbird 152.0.1 (64-bit) Build ID: 20260630165458 Windows 11 IMAP account hosted by Wedos

I found what appears to be a reproducible bug when forwarding messages with attachments.

Steps to reproduce:

1. Open an email with a JPG attachment. 2. Click Forward. 3. Save the message as Draft (IMAP Drafts). 4. Without closing the compose window, save the draft again.

Result:

The second save always fails with:

"An error occurred attaching 20260520_123800.jpg. Please check whether you have access to the file."

Error Console shows:

Failed to fetch attachment NS_ERROR_FILE_NOT_FOUND url=file:///C:/Users/<user>/AppData/Local/Temp/nsmail-1.jpg

I also observed that after the first draft save Thunderbird deletes:

C:\Users\<user>\AppData\Local\Temp\nsmail-1.jpg

However, the compose window still references this deleted temporary file.

Additional observations:

- Creating a new message and attaching a file from disk works correctly. - Forwarding a message without attachments works correctly. - Removing the forwarded attachment and attaching the same file from disk also works correctly. - Closing and reopening the saved draft restores normal behavior.

This appears to be a bug where the compose window continues using a deleted temporary attachment instead of the attachment stored in the IMAP draft.

Can anyone reproduce this with Thunderbird 152.0.1?

The held I did find looked like it was from an earlier version, many items in that example are not on the new message form for Ver152, in particular can attach a variety of things but File is not among them.

Hello,

we have a reproducible issue in Thunderbird when forwarding emails with attachments.

Environment: Windows 11 Professional Thunderbird version 152.0 (The issue also occurred in the previous Thunderbird version) POP3 account Mail provider Strato AVG Business Antivirus installed, but the issue also occurs after testing AVG related settings Issue occurs with different attachment types and sizes, for example PDF and DXF files

Steps to reproduce:

1. Open an email with an attachment. 2. Forward the email using Forward Inline. 3. Add recipient and some text. 4. Save the message as draft. 5. The first save works. 6. Save the same draft again, with or without changing the text.

Actual result: The second save fails with an error message similar to:

“Your message cannot be saved as a draft. There was an error attaching [filename]. Please check if you have sufficient access rights to the file.”

Expected result: The draft should save repeatedly without an attachment error.

Important observations: The problem occurs with all tested attachments, not only one specific file. The file size does not seem to be the cause. The issue also occurred with a small DXF attachment of about 355 KB. The issue also occurs in Thunderbird Troubleshoot Mode. The issue still occurred after creating a new Thunderbird POP3 profile and downloading the remaining emails again from the Strato POP3 mailbox. Changing the draft folder did not solve the issue. Removing temporary Drafts files and rebuilding the Drafts index did not solve the issue. The issue originally appeared to be related to AVG, but later tests showed that AVG is not the main cause. If the automatically inherited attachment is removed from the forwarded message and then manually dragged again from the original email into the draft, the draft can be saved without problems. Changing forwarding mode from Forward Inline to Forward as Attachment solves the issue.

Conclusion: This looks like a Thunderbird issue with automatically inherited attachments in inline forwarded messages. The first draft save works, but on the second save Thunderbird seems unable to reprocess or resolve the inherited attachment and shows a misleading access rights error.

We would appreciate any advice on how to further troubleshoot or resolve this issue. If this is a known bug, we would also be grateful for any information regarding a planned fix or available workaround. We are happy to provide additional information, screenshots or perform further tests if needed.

Hello,

When I forward message with some attachments, new windows opens, with e-mail and attachments, and I can open and review them. If I edit (or not) that message, for no more than couple minutes, I can send it without problems.

But if I left windows open for some time (let say more than 10 minutest, but I not figured out exact amount), I can't view attachments. If I double-click on icons, nothing happens. If I try to send that message, I get message about missing file.

I've noticed, that after opening new window with forwarded message, attachments are copied to %TEMP% folder as nsmail.pdf (or jpg or something). After some time (10 or more minutes as mentioned before) these files disappear, and then problem begins.

The same problem occurs with MAPI generated message with attachment.

Problem tested at two PCs, one PC with 32bit viersion of TB and IMAP, and another with 64bit and POP.

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.

thunderbird keeps stating the following: Sending of the message failed. There was an error attaching My 2nd photo spraying P1080183.JPG. Plese check that you have access to the file.

I get this on the 3 pictures I took myself. What is wrong with your system now? Is this an AI problem? Why am I getting questioned on my pictures now??? Very irritating since no one can answer this simple question.

Pictures are of my area / since I can't find any version number for Thunderbird / but it is updated always it is the most current when AI is present

I am looking for a way to disable the attachment preview pop-up for incoming emails. Almost all attachments I receive are PDFs and it doesn't work with them, only showing a black screen. Further, the popups cause my auto-hide taskbar to keep unhiding and getting in the way of my work.