NIP-05 is just an identifier, for now. Relays can implement their own requirements for posting such as having a NIP-05 identifier.

For verification: Badges would be more useful for this. If you properly verified someone, you could give them a badge, and anyone's client that trusts you says "oh, okay, this person is verified by this person I trust, show a checkmark". Badges could also be useful for things like orange checks.