What vrfy.lol is

vrfy.lol is a free, open-source email address validation API. It tells you everything DNS can reveal about an email address — syntax, deliverability signals, disposable detection, typo correction, provider identification — without ever touching SMTP.

Why no SMTP?

Most email validation services charge per-verification for something that's 80% DNS lookups and 20% SMTP RCPT TO — a technique that most modern providers reject. Gmail returns 250 OK for everything. Microsoft rate-limits you into oblivion. Yahoo blocks you outright.

vrfy.lol does everything DNS can tell you and is honest about the rest. For most sign-up flows, that's enough. For "does this specific mailbox exist?" — send a verification email. That's always been the only reliable answer.

Privacy

Email validation uses POST / exclusively. Email addresses never appear in URLs, server logs, CDN analytics, or browser history. Domain-level results are cached by domain name — no email addresses stored. No analytics, no cookies, no accounts.

Self-hosting

Fork the repo and run your own: wrangler deploy. Zero external dependencies for core validation.

github.com/yokedotlol/vrfy-lol

Contact

hello@yoke.lol

Built by

vrfy.lol is part of the .lol family — free developer tools for DNS, TLS, HTTP, email, and domain intelligence.

Open source: github.com/yokedotlol/vrfy-lol