Email templates - How to add API content

Hey 

Unfortunately not. The email templates use a different template engine "Velocity" rather than Freemarker. It's been requested a number of times, perhaps some work is being done by Khoros on this?

The best we've been able to do is create an Endpoint that produces HTML that is safe for email and we copy and paste this into a custom text string, which we then include in all our email templates. 

This isn't dynamic of course but it adds "recent" content from the Community into the email template without having to update ALL the templates. 

The downside is that you have to do a Studio push to update text strings. 

You might consider voting for this idea 
https://community.khoros.com/t5/Khoros-Communities-Ideas/dynamic-content-in-email-templates/idi-p/73980