Using a public users email address when submitting a form in a Jira automation

[Tom Wakelin]

Hi team, 

How can I reference a public users email address which is an automatic mandatory field in forms when the user doesn't have a Jira account, in an automation? 

When public user submit a form, I want to send them an acknowledgment email, but the field isn't available to use when creating the automation, but its a mandatory field in the form... 

The email address is parsed into the comments section of the submitted form, rather than being treated as a regular field. 

Any ideas? I want to avoid creating a new email address field, and having users record this information twice in the form.