Your inbox has never known peace. Now the fight pays you.
Email promised quiet correspondence and delivered an arms race: filters keep guessing at spam while someone else controls your address, archive, and attention. SithBit changes that bargain. Strangers pay postage at a price you set; friends you fund write without a protocol fee; and roughly 90% of settled postage reaches your wallet. Your wallet is your address, message bodies are sealed to your key, and standard SMTP, IMAP, and POP3 keep familiar mail clients in the loop. There is no SithBit token — every payment uses SOL.
Alpha software: SithBit has no production deployment yet. These docs describe the current implementation and its development and pilot workflows.
The quiet inbox was always a lie
Email never had peace to offer — only filters guessing at spam while the volume climbed. Strip the illusion away and one real thing remains: how badly a sender wants your attention. SithBit makes that desire measurable. Every message from a stranger costs real SOL — a payment is the one thing a spammer, a phishing crew, or the AI writing their mail cannot fake.
Name the price of reaching you
Through a price you set yourself, your mailbox gains real strength. Strangers meet a default that is deliberately a wall; you lower it for the people you want to hear from, and senders you trust write for free. Anyone unwilling to pay what your attention is worth simply never lands. No filter to tune, no guesswork — just your terms.
Get paid for your own inbox
Through that strength comes power over email’s oldest bargain: postage from strangers lands directly in your wallet, compensating the attention you already spend defending it. Opt into the campaign pool and advertisers pay you postage to land in your inbox and a bounty when you reply — on topics you chose.
End spam at the source
Through better economics, a victory fifty years of filtering never delivered: filters treat the symptom, but the incentive to spam was never touched. When reaching a hundred million inboxes costs a hundred million stamps, the math that created spam finally points the other way.
An address nobody can take from you
Winning the spam fight breaks only half of email’s chains. The rest — an address that lives on someone else’s domain, an archive readable on someone else’s servers — break here. Your address is tied to your wallet; move it anywhere and keep your history and identity intact. Every message is sealed to your wallet before its public IPFS copy is written. With Lockbox, sealing happens on your device before the operator sees the message at all.
A protocol, not a product
No gatekeeper, no single company — identity and settlement ride a network nobody owns, and anyone with a domain can run a mail server and earn 10% of the postage it carries, on the same footing as every other operator. It’s that force, not anyone’s promise, that keeps your mail free.
Keep your mail client
SithBit’s reference servers speak standard SMTP, IMAP, and POP3, so familiar mail clients remain part of the system. The coverage table states what is implemented and where support is partial.
Curious how sender-paid postage ended up solving a fifty-year-old email problem? Start with the Prelude for the story of how SithBit came to be, read the Introduction for how the economics work, or go directly to Getting started.