Niko Black launched TANSTAAFL Mail, a Bitcoin Lightning-powered email service where strangers pay satoshis to reach inboxes. The service eliminates spam by creating economic barriers for bulk senders while allowing trusted contacts to email freely. Users earn small Bitcoin amounts for receiving messages from unknown senders, making attention a valuable commodity rather than a free resource.

Built on Bitcoin's Lightning Network, the service enables instant micropayments without banks or permission. Currently live as a web app with Gmail integration, TANSTAAFL promises self-custody of earnings and minimal data collection. Users can withdraw Bitcoin to personal wallets, avoiding corporate control of funds. The approach transforms email from an open channel to a permission-based communication model.

The service addresses email overload by creating a market for attention. Senders must prove their message has value by paying tiny fees, while recipients monetize their time. With desktop apps in development and mobile releases planned, TANSTAAFL represents a fundamental shift in email economics. The system could potentially reduce spam by making mass emailing economically unprofitable.