workflow email

No matter what I try,

I cannot get an email to fire through the workflow manager. The cron job runs every 15 minutes and I’m guessing it’s working ok(shows a bunch of session variables). Each workflow fires except for the emailing. For example to test I added an action to send myself an email and change a lead name. The lead name changed but the email was not sent. Any ideas?

I just figured it out. I am leaving the email field blank. How can I populate the email field with a contact email?