This new feature lets you apply some simple formatting to system email messages. These are system generated emails sent to community members such as password resets, notifications, etc.
To turn on HTML email, go to Email under the Appearance section of your Dashboard and select ‘Enable’. From this page, you’ll be able to upload a logo and set the font, button and page colors.
Once you’ve updated your settings, you can preview or send a test email to see what it looks like. This feature is available on all plan levels.
You can find complete documentation here: http://docs.vanillaforums.com/features/emails/
Give it a try and let us know what you think!