Sniffmail
I built Sniffmail because I was tired of fake and disposable emails getting through signup forms on every project I shipped. It verifies email addresses at the SMTP level without sending an email. One API call returns whether the mailbox exists, is disposable, has a full inbox, or is a catch-all domain. Install with npm install sniffmail, call validateEmail("[email protected]"), get a verdict. REST API available for non-Node stacks. What it checks: SMTP mailbox existence (connects to the mail server, confirms the address is real), disposable/temporary email detection (Mailinator, 10…
Sniffmail launched on March 4, 2026 with 8 votes, #1,340 of 23,380 launches that month and more than 90% of that year's launches.
What it does
SniffMail verifies email addresses before they enter your system without sending a single email. One API call checks if the mailbox exists, detects disposable/temporary emails, flags full inboxes, and identifies catch-all domains. Built for developers: npm install, one function call, done. 10x cheaper than ZeroBounce and NeverBounce. 500 free verifications on signup, no credit card required.
Verify emails exist before they enter your system. Real-time SMTP verification API to reduce bounces and protect your sender reputation. Up to 85% cheaper than competitors.
Reduce bounce rates, increase successful deliveries, block fake signups, and protect your sender reputation with a simple API. 500 free verifications/month with an API key. No credit card required. curl -X POST https://api.sniffmail.io/verify \ -H "Authorization: Bearer sk_live_..." \ -d '{"email": " [email protected] "}' Response Blocked { "email" : " [email protected] " , "is_valid" : false , "is_disposable" : true , "reason" : "Disposable email detected" } Response Valid { "email" : " [email protected] " , "is_valid" : true , "is_disposable" : false , "reason" : "Valid email" } Works with your favorite tools via Use our npm package, call the REST API directly, or connect via Zapier for…from sniffmail.io
In the maker’s words, at launch
I built Sniffmail because I was tired of fake and disposable emails getting through signup forms on every project I shipped. It verifies email addresses at the SMTP level without sending an email. One API call returns whether the mailbox exists, is disposable, has a full inbox, or is a catch-all domain. Install with…
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- AFA fake SMTP server for software integration testing2024 · fakemail.stream · ▲127
This is a side project of mine. Use this as your SMTP server in a test environment to guarantee that your users don't receive test emails. Looking for feedback, especially on the security side.
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