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I have tried on several occasion to send an email with xlsx attachment and you tell me 'This message does not meet our delivery requirements.' I have sent emails previously successfully to the address without the attachment.? What is the problem?

pLEASE HELP IN VERY SIMPLE LANGUAGE .tHANKYOU SO MUCH. ATTACHMENTS TO EMAILS WON'T OPEN. ERROR MESSAGE1765572973244 addons.xpi WARN Checking C:\Program Files\Mozilla Thunderbird\distribution\extensions for addons Uncaught NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIMsgMessageService.messageURIToMsgHdr]

   displayMessage chrome://messenger/content/aboutMessage.js:269
   openTab chrome://messenger/content/mailTabs.js:305
   _cloneTemplate chrome://messenger/content/mailTabs.js:52

aboutMessage.js:269 1765573033678 Toolkit.Telemetry WARN TelemetryStorage::_scanArchive - have seen this id before: 2790b244-a901-47db-9540-2583dbddbb49, overwrite: false

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"save all" to save attachments stopped working. I tried selecting all and Control C to copy them, and that did not work either. Often need to save multiple attachments since I work from home.

Hello! In Thunderbird version 141+, saving attachments from incoming messages is slow. The situation is as follows. A POP3 server and Thunderbird clients are deployed on the local network. When the Thunderbird client receives a message and it appears in the client as new, the user attempts to save all attachments (15 MB) and clicks "Save All." This process takes about 1.5 minutes. In Thunderbird version 115, saving attachments takes 5-10 seconds. Could you please tell me if there's a setting I need to disable in the Thunderbird client? Can I open the "Advanced Settings" in the client and see what specifically I can disable to speed up saving attachments? I've attached the mail server connection settings to my request.

I would like to send three photos as an email attachment. It seems that Thunderbird only allows one attachment at a time. How can I send more than one photo in the same email?

I installed the latest version of Thunderbird on my new Windows 11 PC, and when I try to save an attachment without opening it, it doesn't save. I need to open it and then I can save.

Hi-

I had this working then it magically stopped about a year ago and I can't get it back. When I try to open a pdf I get "...could not be opened, because an unknown error occurred. Try saving to disk first and then opening the file."

I have gone into settings and re-selected adobe acrobat and restarted but still can't open.

I am on a mac.

Thanks for your help! Crazy frustrating and time wasting issue.

I can go to any File Manager and send a file to TB, but from within TB itself regardless of composing new or replying, I can only attach Media, as the app only invokes the Media picker when tapping the Paper Clip icon.

Android 14, latest TB from Play Store.

i have always used thunderbird and am now up to 64 bit thunderbird 144.0.1 on windows 11 25h2

everytime i am sent a pdf file as an attachment i'm having to get thunderbird to open the file before i can actually save it to disc

everything else, while asking me for a name & location to save the file simply doesn't

btw thunderbird is now configured to ask me what to do with the pdf file and it ALWAYS behaves the same

i don't want to have to open files like pdf's that may not be safe / virus free before being able to handle them

way passed the time you fixed this stupidity terry

Hi, RTF attachments won't open. I have set the default application(Libre Office) in Windows, and in Thunderbird. Thunderbird is up to date. So is Windows. I can save the file, then open it, and then delete it, but it's a recurring issue.

Please help!

Matt

Yesterday was fine, but today (11/21/25), I can't send emails with attachments. It's like dial up service without the beeping.

A simple email with a simple image sits and sits and 20% sent, then 27%, then 35% .... then it may go through. Maybe. AND then it tells me that it can't save the sent message.

Slow as a rock.

When I add attachments when replying to emails, the file icons on those attachments don't display. This only happens when replying, the file icons display when receiving emails. Have tried many things to fix this including using ChatGTP with no luck. What can I do to fix this?

Please assist When I go to send a email,I add scanned Documents as a attachment<but in the email Before I send it,I cannot open the attachments It shows Could not be opened,because the associates helper application does not exist chanhe the association in your preferences I have attemped to do the above,But I need your HELP Thank you Darryl. </p>

Hello! An attachment with the 7z extension is sent to the email. It is very inconvenient to save attachments of this type to the computer every time. To open them using the 7-zip archiver, you need to perform several actions (select open, find the program in the program files, and select the exe file). Can you make it so that the user does not have to perform these actions every time?

Suddenly, the body of some my older emails are blank, and their attachments missing! It is sporadic, and there are not specific date windows for when the email bodies/attachments are blank. Some are from a few months ago, some from years ago.

I am a "regular person" email user and have ZERO IT or coding experience. How can I recover the content of these blank emails? Specific, step-by-step help would be much appreciated. I hope to continue using Thunderbird and not have to abandon it.

I run Thunderbird on a iMac, and I use POP to sign in - I think.

Thank you.