Hello @Lamonzie, Pierre (Cognizant) ,
I wasn't able to do it directly via Teams with the default "Insert link" option, but it is possible to copy-paste an already existing mail to link to the wiki page.
For example, write a word of your choosing in MS Word - right click - option link - write mailto:email@keyman .com - OK. Then copy the word to a Teams wiki page and edit it there (or in MS Word).
Hope it helps.
Kind regards,
Domagoj