Manipulate ninja forms mail body
<p>How can I manipulate the ninja forms (3) mail body based on the input of the user? </p>

<p><strong>example:</strong> </p>

<p>The user fills in the <code>zipcode</code> field and I wan't to add data to the mail body of the closest store. </p>

<p>The only useful filter I've found is "<code>ninja_forms_submit_data</code>". But it returns only field ID's and the user input. </p>

<p>What I need is a field key so I can use that as a reference. </p>