Thunderbird Community Forum

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.

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.

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.

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.

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

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 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.