Extract email from User Field

[chrisberry]

Is there a way to extract a users email address from their account info?
Context...
I have a form built in "interfaces" and have toggled on "see who submitted response".
Ideally I'm trying to extract the domains for the users as a method to sort with different views.

Ex. 
forms submitted by "domainA.com"
forms submitted by "domainB.com"

[Sho · Accepted solution]

Automation can get the Email from the user field.
It would be possible to trigger an update of the User field and enter the domain in the String field.

[chrisberry]

Figured it out based on your comment. Appreciate it.