[TYPO3] mailformplus 3.9 html mail?

[Lucas Birk]

Hi all,
I have used th_mailformplus exclusively over all of my sites to send 
HTML mail but now that we have v3.9 I can't seem to figure out how to 
send HTML mail. I have read the doc's but somehow I'm just not 
understanding what I need to do to continue using this option. Even 
looking at the typoscript example I am lost!

Does anyone know how this magic is done?

Thank you,
Lucas.