On a Site.com page we've created there is a 'Contact Us' form that when filled out and submitted, it creates an item in a 'ContactUS' object inside Salesforce. The 'ContactUS' object contains general information like name, email address, a specific message, etc.
We want an email alert to be sent out to our support team with the contents of the 'ContactUS' object.
I have it set up the email alert, and it works as needed, however, the 'From Email Address' shows something like
firstname.lastname@example.org on behalf of mysite guest user [email@example.com] (As it looks from within my Outlook).
How can I get the email alert to put the user's email address from the 'ContactUS' field? The only option I have in the 'Edit Email Alert' for 'From Email Address' is 'Current User's email address'.