Rythm

Rythm adds a bouncer to your email so you control who reaches you. It builds a guest list from your Gmail or Outlook contacts, lets known senders through, and files unknown senders into a separate folder you can check on your terms. Strangers can pay a small cover charge to reach your inbox, with paid messages marked PAID and funds sent to your wallet. Rythm scans messages only to detect payment proofs and discards contents, never storing or sharing any email content.