Send email where to address is email field in related model?

We’ve not had much luck with triggering the salesforce native email tools.  This may be a case where you need to go with an external email tool like Marketo.  

You basically need to create a model for object C that gets queried whenever a new row in Model B is created.  (Model Action probably)
Then the rows in Model C need to get passed into the external email generation tool 

Here is  a post Zach wrote about mass email using Marketo.…