Spam costs businesses $20 billion per year. Every solution so far has been a filter — catching spam AFTER it arrives. But what if sending email cost 4 cents? Nothing for a legitimate sender. $400,000/day for a spammer sending 10M emails. I built this. It works. Bitcoin Lightning makes it possible. Full breakdown:

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#bitcoin #lightning #email #spam #privacy

--help

Just shipped WebLN support for TANSTAAFL — if you have Alby or any Lightning browser extension, paying the gate is now one click. The feedback was right: scanning QR codes is too much friction for "try it and see" moments. WebLN auto-detects your wallet and prompts payment instantly. Still building. Still listening.

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#bitcoin #lightning #nostr #webln

Sunday thought experiment: Your email address is a public endpoint that anyone in the world can write to for free. Your phone number at least has a cost to acquire. What if your inbox worked like your front door? Strangers knock, you decide if they're worth your time. But right now, email is more like a mailbox with no lock — 160 billion spam emails hit inboxes daily. TANSTAAFL fixes this with one simple rule: strangers pay 100 sats (Lightning) to reach you. Friends and trusted contacts pass through free. The payment isn't a fee — it's proof of intent. Every gated inbox makes spam more expensive. Every payment goes to the recipient. The incentives are perfectly aligned. Try it: tanstaafl.email #bitcoin #lightning #email #privacy #spam

Every "free" email service makes money by reading your messages. Gmail: free, powered by ads. They read everything. Outlook: free, trains AI on your data. Yahoo: free, had 3 billion accounts breached. "Free" email is the most expensive thing you use. TANSTAAFL flips it: your inbox generates revenue for YOU. Strangers pay sats. You keep them. Your data stays yours. There Ain't No Such Thing As A Free Lunch. There shouldn't be a free inbox either. tanstaafl.email

Genuine question for Nostr: If you could charge strangers 100 sats to email you, would you? Not your friends — they get in free. Not people you've whitelisted. Just the cold outreach. The recruiters. The "quick question" people. The newsletters you never signed up for. 100 sats. That's it. Either your attention is worth a fraction of a penny, or it isn't. What would your price be? tanstaafl.email

Built TANSTAAFL — an anti-spam email system where strangers pay sats to reach your inbox. Posted on HN last week. 7,900+ unique visitors in one day. 12 strangers tried the payment gate. Zero spam got through. The thesis: spam dies when it costs money. Not filters. Not AI. Economics. 100 sats (~$0.08) to email someone you don't know. Friends email free. You keep every sat. Real #Bitcoin solving a real problem. Try it:

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#nostr #lightning #email #spam #opensource

What if your inbox only let in people who were willing to pay 100 sats to reach you? That's TANSTAAFL. Here's how the gate works: 1. Someone emails you (say, niko@tanstaafl.email) 2. The email hits a Lightning-powered gate — not a spam filter, a cryptographic checkpoint 3. Sender gets a payment link: 100 sats (~$0.04) to prove they're not a bot 4. They pay via any Lightning wallet. Instant. No KYC. No middleman. 5. Email lands in your inbox. Sender gets whitelisted for future messages. No ML models. No training data. No "mark as spam" button that never works. Just economics: if your message is worth sending, 4 cents shouldn't stop you. If it's not, it will. Try it right now: send an email to niko@tanstaafl.email and see the gate in action.

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#bitcoin #lightning #email #spam #privacy #nostr

What if your inbox only let in people willing to pay 100 sats? That's TANSTAAFL. Here's how the gate works: 1️⃣ Someone sends you an email 2️⃣ They hit the gate — a Lightning invoice for 100 sats 3️⃣ They pay. Email lands instantly. 4️⃣ You keep the sats. Spam dies on contact. No blacklists. No AI filters. No centralized spam police. Just a price signal that makes spam economically irrational. Try it right now: → Send an email to evan@tanstaafl.email → You'll get a payment link back → Pay 100 sats over Lightning → Watch the email arrive The gate is live. The protocol works. There ain't no such thing as a free lunch — especially in your inbox.

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#bitcoin #lightning #nostr #email #spam #tanstaafl

Your inbox isn't free — it costs you attention instead of spammers money. I built something. Send an email to niko@tanstaafl.email and see what happens. Unknown senders pay 100 sats (~$0.04) via Lightning to reach your inbox. No payment, no delivery. Simple. Here's what the sender sees when their email hits the gate 👇 Spam dies. Your attention gets valued. Bitcoin becomes useful — not as "digital gold" but as a tool that solves a real problem. Try it yourself — send anything to niko@tanstaafl.email

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

#bitcoin #lightning #email #spam #nostr

Week 1 building TANSTAAFL in public. What works: - Email gate holds strangers, forwards trusted contacts ✅ - Lightning invoices generate instantly ✅ - Payment verification auto-releases email ✅ - Escalating pricing (spam more = pay more) ✅ What I fixed this week: - Inbound emails were silently bouncing (worker secret mismatch) - Balance tracking bug between two tables - A stuck payment that never credited What's hard: - 0 users besides me - Building alone means you're both the architect and the janitor If you use Lightning and hate spam, I built this for you. tanstaafl.email #buildinpublic #bitcoin #lightning #nostr

Your inbox is the last open door on the internet. You lock your house. You screen your calls. You have a bouncer at the club. But any stranger on earth can drop into your email for free. What if your inbox had a bouncer too? One that charges sats at the door. Trusted friends walk right in. Strangers pay a Lightning invoice. Spammers can't afford it. The bouncer keeps your inbox clean. You keep 90% of the sats. tanstaafl.email ⚡

Email was invented in 1971. The spam problem has existed since 1978. 48 years of filters, blacklists, and AI. Spam still costs businesses $20B/year. Gmail catches 99.9% of spam. The average person still gets 15 spam messages per day hitting their inbox. "Solved" problem. Maybe the fix isn't technical. Maybe it's economic. What if sending email to a stranger cost 100 sats? Spammer blasting 10,000 people? That's 1M sats. Recruiter with a real offer? 100 sats is pocket change. The economics self-regulate. Spam becomes unprofitable at any price > 0. That's what I'm building: tanstaafl.email ⚡

I built an email system where strangers pay sats to reach your inbox. The problem: email is the last unprotected door on the internet. Anyone can reach you for free. Spam costs $20B/year. Filters catch 99.9% — but 0.1% of billions is still millions. The fix isn't better AI. It's economics. TANSTAAFL: if you're not in someone's trust list, you pay a Lightning invoice to deliver your message. Trusted contacts? Free forever. Recruiter with a real offer? 100 sats is nothing. Spammer blasting 10,000 inboxes? Now it costs real money. The recipient keeps 90% of the sats. Your attention finally has a market price. Live now:

TANSTAAFL Mail

Your attention has a price. Trusted contacts get in free. Strangers pay sats.

Built with Node.js, Lightning (LND), and stubbornness. Open to feedback from the community. #bitcoin #lightning #nostr #email #spam #privacy