You could use your own wallet as long as it and the chain was BIP65 which many are and someone listed it on BlockDX.
Then you are your own exchange - no KYC unless you are checking your own ID's LOL
Wallet to Wallet trading with ATOMIC SWAPS.
Since its me at my computer and you at your computer - there is no email. You run the dApp which is the Peer to Peer DX.
So you are the maker/taker and so am I with atomic swaps - we are both protected 100% trustless.
Heck we could exchange offer on bitcointalk or for that matter 4chan post it on the BlockDX dApp and neither of us could scam each other.
It needs to use Full Node - REAL wallets (lite wallets in future) so this isnt a newb exchange platform - you need to run your own wallets.