Only your connections on Cooper can message you.
These are verified users, that you've interacted with in one of the following ways:
- You've added them to your network on Cooper, and they've added you to theirs
- You've been introduced to them on Cooper by a mutual connection, and all parties have accepted the intro
- You've shared your personal invite code with them and they've used it to sign up to Cooper
You curate your network according to your needs.