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

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?

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 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.

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.

Hello, I’ve just started using Thunderbird and I really like it so far.

I have one question regarding attachments. In emails that include attachments, is it possible to change how the attachment area is displayed? Currently, it appears as a single line at the bottom of the message. Ideally, I’d like to have it displayed more prominently, preferably at the top of the message, similar to how it appears in Outlook.

So far, the only adjustment I’ve made is setting mailnews.attachments.display.start_expanded to always show attachments expanded. Are there any other settings or methods to further customize the attachment view or position?

Thank you in advance.

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

i often receive emails with images attached, and most of the time people don't resize the image. so you can imagine over time this all adds up. i dont always need to keep a 6mb image versions. i would love if there is a way to resize the email image attachment, to at least still have a smaller copy for refence, but not end up with a huge email account (local/pop3)

preferably a one click solution, or even a routine i can run on the file system, etc.

thanks

We have our accounts on one computer and one dedicated email (using Thunderbird) which sends our invoices to our customers in PDF format as an attachment to an email. This stopped working a few days ago. The tech department of our accounts package supplied by Benchmak/Snip has looked at our system and the only thing they can suggest is that the emails are being blocked because may be Thunderbird thinks they are SPAM. We have been using this system for a couple of years now and has been fine. We can send and receive emails to/from this account, it's only the PDF attachments of invoices which isn't working. Can any one help please, thank you.