I'm sending an application to a freelance software developer by email. My goal is to work for free in my spare time (not quite an internship, but basically an internship). I have a completed, and appropriate, resume, however I'm stuck with one problem: I can't find their last name anywhere!
I have found their first name is Matt, but I hardly think "Matt:" is an appropriate way to start an introductory email, since we're hardly on a first name basis.
How do I address this email without their last name yet retain the formality of a business introduction? I have no other contact avenue besides email.