Originally Posted by Jetnfast

Well after looking into the addendum section a little further I saw this note:

"Delta Air Lines accepts professional recommendations from Delta employees as well as sources external to our company. Use this link to send a request to anyone wanting to submit a recommendation. You must know their email address. The recommender will be sent a detailed email that provides tools to generate the online recommendation."

Based on that, it sounds like externals are ok as well. Regardless, its the same email link, you either put someone in with a @delta.com or @xxxx.com email if they are external. Good to know.