Custom RSS Email Tokens

I have custom tokens in my RSS feed to use in my emails but HubSpot can't see the custom xml values and therefore expose them to as tokens to the rss email.

 

For example, I have an image tag in each rss post item. I'd like to format my email so that the image is above the blog post title and have the summary below the title like this.

 

{{post.image}}

{{post.title}}

{{post.summary}}

 

I can't do this today without really hacking the rss and using a default field for non-default purposes (such as sticking the image url into the comments url feed instead of the actual comments url)