Small teams usually have to build their email lists from scratch, which means each team member (i.e. Collaborator) must compile a mailing list!
Tap Your Network: Rack your brain and hand- pick 25-50 people that already love what you do, know what you're all about, and trust you.
Get Personal: These should be people that you feel comfortable reaching out to personally (your family, friends, classmates, baby sitter, etc).
Power In Numbers: Between you and your team, you should be able to compile hundreds, if not thousands of email addresses.