Why when I send an attachment as an icon in Macmail in Catalina, does it arrives, inline, to the person I sent it to

Send email attachments to Windows users

In the Mail app  on your Mac, try these suggestions:

• Send Windows-friendly attachments. To do so for all messages, choose Edit > Attachments, then select Always Send Windows-Friendly Attachments. For a specific message, click the Attach button  in the toolbar of the new message window, then select Send Windows-Friendly Attachments (if you don’t see the checkbox, click Options in the bottom corner).
• Send documents as PDFs instead of in their original format.
• Use filename extensions (such as .docx for a Microsoft Word document).
• If the recipient sees two attachments (such as “MyFile” and “._MyFile”), the recipient can ignore the file with the underscore (such as “._MyFile”).

To display an attachment (such as a one-page PDF document or an image) as an icon, Control-click the attachment in your message, then choose View as Icon. To show the attachment again, Control-click it, then choose View in Place.

If the message size shown on the left side of the message header is red, the attachments are causing your message to exceed size limits set by your email account provider. Try reducing the number or size of attachments or use Mail Drop.

https://support.apple.com/guide/mail/add-attachments-to-emails-mlhlp1050/mac#:~:text=To%20do%20so%20for%20all,Options%20in%20the%20bottom%20corner).

Apple Mail - remove in-line attachments

There is no current way to stop attachments being embedded in-line with Apple Mail. Annoying.

This simple command in Terminal will use the traditional method, whereby an attachment is just that - an attachment:

defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes

Your message is now image and clutter free.

Now if you want to revert it back, then simply enter the following command in Terminal:

defaults write com.apple.mail DisableInlineAttachmentViewing -bool no

Mysterious Create new User fix…

https://discussions.apple.com/thread/250392234?answerId=250754157022#250754157022

How to stop inline attachments

Simple fix I found..

Open Terminal, can be done by searching "terminal" in search bar.

copy and paste the following ( without quotes) "

"defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes"

Just know that this turns off inline images entirely, including any images you may have in your email signature. To revert back to the default inline mode, simply replace the “yes” at the end with the word “false” (without quotes).

Yes it is strange, silly steps but Zipping it should work, or maybe Thunderbird?

https://www.thunderbird.net/en-US/