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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

There are two pdf files attached to an email I received. When selecting view all and then save all, one file gets saved with the name of the other file, and a zero byte file is created with correct name. The other file is not saved. This erroneous behaviour is repeatable.

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.

When I recieve email with inline images all are shown as attachment at the end. These are personal photos usually send in an email generated on a cell phone, but the same happens when coming from a PC running t-bird as well. All are Win 11 and the O/S and TBird are all updated regularly. Changing "View Messaage Body As " HTML original, HTML simple, or TEXT, only changes the size of the placeholder. The configuation is pretty much as provided by the setup program. I assume this is a simple setup step I am missing as it is the same on two PCs that are WIN 11 and one that is UBUNTU.

When I forward email chains containing more than one email, the attachments will not appear for the recipient.

Once when forwarding the same chain a second time, the attachments did then show up.

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.

Hi Team,

Regarding replying previous email, I have tried several time to attach files or photos, but the app will be closed automatically. Do I need to do any settings for it?

However, for creating new email, there is no problem for attaching files.

Best regards, Tomas

I had received an important email that had 6 attachments. I was able to open them yesterday, but today the link to them at the bottom of the email is missing, so there is no trace of the attachments. Is there any way to recover them? I tried clicking on the inbox folder/ properties & then repair folder, but it didn't help.Thanks

Hello, in my version of Thunderbird (140.11.1esr (64-bit)) on Windows, attachments appear at the bottom of the message. However, I would like the attachment bar to appear at the top of the email: how can I do this?

Kind regards, Inès

I have a client who has been using Thunderbird for years - in the last couple of weeks when doing his normal scan to email he is suddenly getting this error message, after filling in the email details and clicking send

"Sending of the message failed - there was an error attaching xyz.PDF. Please check that you have access to the file"

Process is... 1. do a Scan to Email via the Brother printer console panel 2. Scan completes and opens the TB new email message - File saves into the default folder \pictures\cc4\email 3. Fill in the recipient, subject and message body 4. Click send message in TB 5. Error above is presented

I can open the the attachment within Thunderbird to check it and it opens just fine - the scanned file is actually there... But click the send button and that error is presented.

I can fix it by removing the attachment and reattaching manually from the email folder where scan is saved.

When I try it myself (remote support), either via the brother CC4 app or getting client to trigger the scan to email, it often works, but invariably he calls back after his next scan to email and it is broken again...

Scans were saving to a Onedrive folder originally, moved the save location back to the standard user/pictures/cc4 folder assuming Onedrive may have been interfering, but it is still behaving the same.

Anyone have any clues what might be going on here? The brother software seems to be doing what it is supposed to. I have reinstalled both the Brother software and Thunderbird with no change... Windows updates maybe?

In the interim I have him doing scan to file and attaching manually, but would be nice to get this sorted for him...

its an Acer laptop running Windows 11 pro 25H2, TB version was 150.0.2 originally but still doing the same on the latest 151.0 that I installed two days ago

Thanks for reading... any help appreciated

The attachment icon is missing from the message display pane in incoming emails in Thunderbird. Before it was always displayed at the bottom of the window. I have 'Display Attachments Inline' checked and I also repaired the Inbox folder but still no icon visible. I am using the latest version of Mozilla Thunderbird 151.0.

Last week I saved the attachments of an email to a new folder in Documents. Today I received a new email with attachments. I saved these attachments to the same folder. To my surprise the old files (from last week) got a new timestamp. The date is today and the time is a couple of minutes after midnight. Any idea how this is possible? PS. I'm using Thunderbird on an Ubuntu machine.

Does Thunderbird use an internal PDF print driver? I can't print PDF attachments in color from an email. I've checked my print settings but Thunderbird only prints black. If I save the PDF file and then double click it, Adobe comes up and prints it full color. I'd appreciate it if it can brought to soneones attention.

Thank you.

I've noticed that if I attach a file to an outgoing message then use ctrl+enter to send the message, Thunderbird also opens the attachment. How can I prevent it from doing the latter?

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?

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 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