FAQ

Do honest senders really pay nothing?

They pay the Solana network fee, a fraction of a cent. The bond comes back in full on a reply or after the deadline, and the deposit that stores the message comes back whichever way the knock ends. The test suite checks this to the lamport.

What stops a recipient from marking everything as spam?

Their record. Every inbox shows how many knocks it received, answered, kept as spam and the total it kept. No instruction can lower or reset those numbers, and an inbox can never be closed and reopened. Senders see them before they knock.

Can a sender take the bond back if they change their mind?

No. If they could, a spammer would deliver the message and withdraw before it was read. The bond comes back on a reply or at the deadline.

Who can read my message?

Only the recipient. The app encrypts it in your browser to the recipient's X25519 key. The chain stores ciphertext.

Why did email never do this?

There was nowhere neutral to hold the money and no way to return it automatically. Philip Raymond proposed sender bonds in the 1990s, and Loder, Van Alstyne and Wash worked out attention bonds in 2004, but a mail server cannot escrow money. A Solana program can.

How is this different from paid DMs?

Paid DMs charge every time. D00R charges only spam. Earn.com charged senders on every message; Coinbase bought it in 2018 and the paid inbox closed.

Why the zeros in the name?

They are what an honest sender pays. Reply or deadline, the bond comes back whole, and the only number left on their side is zero.

What is the D00R token for?

Spam fees buy it on the open market and burn it, and claiming a custom inbox name burns it. It is not needed to send or receive knocks: bonds are USDC or SOL.

Is there a token address yet?

No. There is none until launch.

Can AI agents use it?

That is the next stage. An agent that wants a human's attention puts a bond behind it, under the same rules as a person.