Attach and not embed files in Mail app

Do you want the files in line or not? In your first paragraph, you seem to be saying that you don't want the recipients to see the files in line and in the second paragraph you say having them in line is the way it should be. Try putting the files in a folder and then attach the folder if you don't want them in line.

An article Add attachments to emails in Mail on Mac - Apple Support

The setting always send windows - friendly attachments is by default in IMAP accounts ( gmail account ) , I could not find options button as you have shown with the screen shot .

Yes what you said will benefit .

See these screen shots .

In the third screen shot its your choice to attach files or folders , you can use attach button or open finder and then drag and drop into the mail window .

But after blue folder , you must click on enter key two times at least or take cursor below the folder and then type the sentence .

All attachments are attachments. The inline directive is merely a suggestion for the recipient's email client. It should handle the inline directive without any problems. If it can't, it doesn't support internet email standards. Nothing in the inline directive implies "embed."

There are options in the Edit menu to attach the file at the end of the message, but there is no option to not set the inline directive.

What you don't seem to understand that it is always an attachment, regardless of how it appears. There is no other way to transmit a file over the email protocol. Mail will always use the inline directive for an attachment. There is nothing you can do to change that in Mail. It is up to your recipient's email client to handle the directive as it sees fit. Some email clients can be configured to ignore the directives.

If you click the paper clip icon in the Mail compose toolbar, the resulting file chooser has an options button in the lower left corner that leads one to the Send Windows-Friendly Attachments selection box.

I am booted into El Capitan and High Sierra, and both have this feature.

In your image, clicking on the options button, and selecting “Send Windows-Friendly Attachments,” can be of benefit for that category of recipients.

Thanks ! for the info .

Send windows - friendly attachments is checked thats why it was showing a check mark when I clicked on edit > Attachments .