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Trumailo - Realtime Email Verification
Eight checks. Ten milliseconds.
Eight deliverability signals per address. Real SMTP handshake, catch-all probe, provider mapping. Cached responses under 10ms. Open source, free during beta.
Hi Hunters,
We built Trumailo because we got tired of guessing.
A few months ago we ran a campaign to ~14,000 addresses collected through legitimate signups. 2,100 bounced. Our deliverability dashboard dropped 8 points overnight, mailbox providers throttled the
next three sends, and the open-rate cohort took a quarter to recover. The infuriating part: most of those addresses looked fine. Valid format. MX records present. A free verifier had marked them
deliverable.
Turns out most verifiers stop at the easy checks. Format and MX get you ~60% of the way. The remaining 40% disposable inboxes, role addresses, typo'd domains, catch-alls that accept everything and
bounce later is where deliverability actually dies.
Trumailo runs all eight signals format, MX, real SMTP RCPT-TO handshake to the recipient's server, catch-all probe with a canary address, role detection, 30k-domain disposable list, provider
mapping, and Levenshtein typo suggestions in a single sub-100ms JSON response. Cached responses are under 10ms.
A few things we're proud of:
- Real RCPT-TO probe, not just MX lookup the same handshake your customer's MTA does.
- Catch-all detection via a canary local-part, not "we accept everything" guessing.
- Full stack is open source Go API, Next.js dashboard, Postgres + Redis + NATS. Self-host or use the cloud, your call.
- WordPress plugin just got approved by WP.org auto-detects 20 form / CRM / checkout plugins and rejects bad emails at the form level before they touch your list.
On pricing: $0.38 per 1,000 verifications on Pro vs ~$5.24 industry average. 7-day unlimited trial on every paid tier. Free during public beta 200/month, no card required.
We'd genuinely love feedback. What checks are we missing? What integrations should we ship next? What would make this a "yes, immediately" tool for you?
Try it → trumailo.com
About Trumailo - Realtime Email Verification on Product Hunt
“Eight checks. Ten milliseconds.”
Trumailo - Realtime Email Verification was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #132 on the daily leaderboard. Eight deliverability signals per address. Real SMTP handshake, catch-all probe, provider mapping. Cached responses under 10ms. Open source, free during beta.
On the analytics side, Trumailo - Realtime Email Verification competes within Email, User Experience and Tech — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how Trumailo - Realtime Email Verification performed against the three products that launched closest to it on the same day.
Who hunted Trumailo - Realtime Email Verification?
Trumailo - Realtime Email Verification was hunted by Rutvik Panchal. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Trumailo - Realtime Email Verification including community comment highlights and product details, visit the product overview.
Rutvik Panchal