There are a few different ways to do this, Chris.

The info can be found here: http://documentation.unbounce.com/hc/en-us/articles/203879170-Lead-Notification-and-Communication#co…

Please note, for the main method described on that page, you’ll need a Pro account, and also, you’ll need to have this set up on the Client level.

Another workaround (the one that I use), is to use Zapier. Zapier is a 3rd party tool that lets you connect different tools together. So I connect my Unbounce pages to a Zapier email tool, and then I can fully customize the emails, who they are sent from, etc., all within Zapier. More info on that can be found here: https://zapier.com/zapbook/unbounce/email/

Zapier is one of my favorite go to’s!