@aviator21114
>Is this you’re understanding of my intent and will your suggestion accomplish this?
I understand your goal. The visual designer’s Send Mail action does not support parameterized header fields at this time. Here’s an alternative approach that you might experiment with. Internally the Send Mail action uses this phoneui.js function which you can call directly. If you want to see more open the phoneui.js file in the js editor and search for “mail” keyword to see this and related functionality. If you use this function start with very simple example and get familiar with it before throwing your full problem at it.
/**
* Open native "Compose Email" UI.
* subject, body - text or html
* to, cc, bcc - collections of recipients
* For web applications length of all url-encoded parameters should not exceed 2000 chars.
*/
phoneui.composeEmail = function(subject, body, to, cc, bcc, isHTML) {...}
phoneui.composeEmail("how to send email", "this is how you send email... blah blah", "john@acme.com")