How do I change Font kerning in Mail?

PASTE IN is the only solution that I can find. Text Edit, Pages, and many, many, many other text editing apps allow users to customize font kerning. How do I adjust font kerning using Mail?

In case you did not know, the kern is the space between letters. Custom kerning allows user to increase or decrease letter spacing. In TextEdit, open menu Format › Font › Kern and select one of Use none | Use default | Increase ⌥⌘] | Decrease ⌥⌘[. Custom kerning is vastly far more powerful than selecting fonts that are designed to look slightly further apart. Spacing is often critical to improve emphasis and readability. Indispensible to creative communication. Which is why it is very odd that I cannot find kerning in any Mail menu, or in the Fonts pane that opens for Mail.

Mail default text is not kerned. Kerned in excellence by the vast majority of apps that edit text, you can paste custom kerning from all of those apps into Mail, retaining custom kern. Paste back from Mail into other text editors and kern is lost, Mail is not communicating kern, only accepting good typography.

You can keep typing custom kern that flows from pasted-in kern, and that is good… very excellent would be the Mail menu enabling kerning for everyone! But kerning is not in the Mail menu as far as I can see. Pasting kerned text back into kerning app kills kern.

Mail needs built-in kerning. Like in all those other Apple apps!

I will make the first reply to this post with two important screen captures.