Is it possible to pull the source email address via api?

We're revising our account verification process, and I've learned that Zendesk won't allow you to email users' secondary email addresses.

This definitely should be fixed, but now I'm realizing we can't even easily see users' secondary email address easily, or see what account the ticket is coming from.  The only way to tell is to find the "view original email" which is hugely inconvenient for our team members.  

I figured I'd use a target to automate an internal note showing the incoming requester address as email tickets are created, but it looks like this isn't an option.  Is there anyway to find that information via api?