one-tap send clipboard message in markdown as an HTML email using Drafts and Launch Center Pro. This action takes the first line as recipients and the remaining as the content. This action works for emails with more than a single paragraph.

Send long markdown email

//Create the following rule at Launch Center Pro:

drafts://x-callback-url/create?text={{[[clipboard]]}}&action=Markdown%20Long

//Add the following rule to Drafts, named Markdown Long:

drafts://x-callback-url/create?text=[[body]]&action=Markdown%3A%20Copy%20to%20Clipboard&x-source=Drafts&x-success={{drafts://x-callback-url/create?text=[[title]]&action=Long%20Clipboard%20Mail&afterSuccess=Delete}}&afterSuccess=Delete

//Add this other rule to Drafts, named Long Clipboard Mail:

launchpro-email://x-callback-url/?to=[[draft]]&subject=&body=[[clipboard]]

//You're good to go.