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In version 142.0, none of the usual methods for deleting attachments is working for me. From the drop-down menu in the attachments area, "Detach all" saves the attachments but does not delete them. "Delete all" does nothing. Selecting one attachment and pressing the <delete> key does not work. Selecting one attachment and using the "delete" command from the drop-menu does not work.

Any ideas?

I am trying to send a message with lots of MIME attachments from Thunderbird. After I click "Send", I get this error message: "Number of MIME parts exceeds maximum permitted". Unhelpfully it does not say what the maximum is and I cannot find this information in Support.

I have uploaded an image of the message I get. I have 100GB of free disk space on my C drive where my Thunderbird programme is and 531 GB free space on the drive where I keep my Thunderbird profile - with all the mailboxes and archives. Windows 10 desktop computer.

Anyone know what the maximum number of MIME attachments to an email is? Thanks in advance

I need to attach files of total size 54mb. I open the folder where the files are stored in File Explorer and select all of them. I press ENTER and it says “These are large files. It might be better to use Filelink instead.” I click Link, and it displays the uploaded image.

Thanks for your help, SweetTasha

TB in WIN11. Right click on any file. In Win10, there was a "send to" option. In Win11, there's a "share" option. To send a file directly, select "show more options." The older version's menu will appear, and it will say "send to -> email recipient." Is there a way to generate an option to send files faster? When the file sending window appears from the file manager, the cursor in the message writing window doesn't move to the address field (as it does when composing a new message) but somewhere else. This is quite strange, because you automatically start typing the recipient's address, but it doesn't appear in the program. This is probably more a system issue than Mozilla's. Perhaps a registry entry or other action might work. Perhaps the submenu after right-clicking on a file, or the icon at the top next to "Copy, Paste, Cut" or in section share it.

I Have Thunderbird 137.0.2 running on Win11

When saving an attachment and navigating to target folder for save, no files in the target folder on the local PC are displayed.

This is not the case when looking for an attachment to send, only when saving attachment. I have another instance of a slightly older release of Thunderbird on a Win10 PC that behaves the same. Anu Ideas?

Is there a way to disable Thunderbird’s ability to open email attachments (image attachments currently)? We’re no stranger to message spam, or how message remote content can be abused, but images can still display fraudulent content. I’m hoping the images don’t contain any other surprises. Thank you for your time.

Drag and Drop attachments to the desktop stopped working again with Thunderbird 145. Steps to reproduce: You receive a mail with an attachment. You drag an attached file from this message and drop it onto the desktop of your Mac to download it. The attached file is not saved to the desktop (or any other folder I tried). This is on MacOS 26.1 MacMini M4. Please fix asap.

I want to save a PDF from Thunderbird under a slightly different name from what is already existing within the directory. This would save me from repeatedly typing filenames.

For example my directory already contains "version1.pdf". I want to save an attached file as "version2.pdf". To do this I first search for "version" and highlight the file. Then I want to just change the 1 to a 2.

But the moment I highlight "version1.pdf" in the file list, the REPLACE button is greyed out. Is this intended behaviour?

TB 128.9.1esr, Ubuntu 25.04

Hi,

Where can I change in the settings the default Attachment Save(As) Folder / Directory. That Folder is also used by extract-em (for "save individual attachments"). On my installation it defaults to c:\user\myname\desktop but I can't find a way to change that location.

Another question : is there a way to disable the standard TB attachment Save(As) (shown at the bottom of a message) and replace it completely by extract-em ?

Thank you

Dear Thunderbird, I am using version 128.10.2esr and I have noticed lately that in my Inbox the email From have all been given the same incorrect senders name. This usually happens to emails that contain an attachment How do I correct this ? Thank you. Regards. Steve Hawes.

Hi!

Under the upper right hand Menu, where do I find the Attachments submenu, with the choice between Save to Disk and Open in TB? Is it under Settings or under Add-ons?

Thank you very much in advance for all advice!

Best, Stefan

Thunderbird checks an email you are composing for the word "attached" and if it finds it, warns you that you may have forgotten to attach a file.

Can I add the word "stegys" as a synonym for "attached" ? This is the Cornish word for attached. Alternatively, if I add the Thunderbird Cornish dictionary, would Thunderbird warn me when it finds "stegys" in the text. I already have an excellent Cornish dictionary extension for Libre Office, and as such it seems overkill to add a second dictionary as I can spell check text in Writer and then paste it into Thunderbird. So adding a synonym would be my preferred option.

Many thanks in advance.

Hope someone can resolve this "Thunderbird mystery" for me.

I just sent an email to 9 people. The message was a few paragraphs and would normally be 8.6 kb in size. (I know because I copied and pasted the body of the message into a "test" email, and TB showed 8.6 kb as the size.)

My message included an attachment of 58.0 kb in size. [It also included 3 links, but those shouldn't contribute more than a miniscule amount (just the actual letters in the link) to the size, right?]

Yet when I sent the message plus attachment (and copied myself), Thunderbird showed it as 5.3 MB (!) in size.

How can that be? Any help would be appreciated.

Andrew

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

Hello,

When I try to save attachments from emails directly on my Computer, they never arrive at the destination folder - not individual files nor "save all attachements". Although the procedure '(left button menu - save - [navigation through file system till to the destination-folder] - save here') is "normal" and does not give any error message.

I can only save attachements, when i first open them (e.g. in word), and save them from there in its destination folder. This is quite a complicated procedure .. one should be able to save attachments directly from Thunderbird, without opening it.

What is the reason for this problem? Are there any options, is it a local problem (but it is a brandnew Laptop) or is it a bug in Thunderbird?

Best, Renate Albrecher

I recently installed 145.0, was running the latest esr release before on my Windows laptop.

Now when I try to drag a file into an email to attach it, I get the black no smoking sign. Only way to attach is to use the drop down menu. Drag & drop was working fine in the esr version.