Mail app no longer automatically creates clickable hyperlinks when pasting a URL. How do I fix it? Since recently the MacOS Mail app no longer automatically converts a URL (that I paste) into a clickable hyperlink. 
How do I fix this? 

Working on MacOS Mojave 10.14.1 in Mail 12.1
Acutally they just changed the default setting... In Mac Mail Just go to the menu "edit->subsistutions->smart links" and click on it if it's unchecked to active the feaure.

After that you can paste or type links and it will do the add link operation automatically.