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KillBounce
Email verifier that actually handles catch-all domains
Three-layer email verification with a real SMTP probe not regex pretending. Built because the $80/month tools couldn't handle catch-all domains on Google Workspace (anti-enumeration tricks every regex-and-DNS approach into a false "accept all"). KillBounce opens a live SMTP session with the recipient server and reads the actual response. $4 per 1,000 credits. Pay-as-you-go. Credits never expire. Public legal stack at /trust for procurement.
I built KillBounce after getting tired of paying $80+/month for email verification tools that still let bad emails slip through. The biggest problem? Catch-all domains. Most verifiers see a catch-all domain, label it "Valid" with high confidence, and move on. Then your campaign goes out, hard bounces pile up, and your sender reputation takes the hit.
KillBounce goes deeper. Instead of stopping at syntax checks and DNS records, it opens a real SMTP conversation with the receiving server and analyzes how the server actually behaves. That means better detection of risky, catch-all, and undeliverable emails before you send. ✅ Syntax, DNS & MX validation ✅ Live SMTP verification ✅ Better catch-all detection ✅ No monthly subscription ✅ Credits never expire
Pricing starts at just $4 for 1,000 verifications.
I'd love feedback on: 🔹 Is the pricing simple and fair? 🔹 Does the catch-all explanation make sense? 🔹 Is our Trust page useful for security reviews, or unnecessary?
🎁 First 100 Product Hunt commenters get 1,000 free credits just leave a comment and I'll DM you the details.
“Email verifier that actually handles catch-all domains”
KillBounce was submitted on Product Hunt and earned 7 upvotes and 4 comments, placing #62 on the daily leaderboard. Three-layer email verification with a real SMTP probe not regex pretending. Built because the $80/month tools couldn't handle catch-all domains on Google Workspace (anti-enumeration tricks every regex-and-DNS approach into a false "accept all"). KillBounce opens a live SMTP session with the recipient server and reads the actual response. $4 per 1,000 credits. Pay-as-you-go. Credits never expire. Public legal stack at /trust for procurement.
On the analytics side, KillBounce competes within Email, Email Marketing and Developer Tools — topics that collectively have 584.2k followers on Product Hunt. The dashboard above tracks how KillBounce performed against the three products that launched closest to it on the same day.
Who hunted KillBounce?
KillBounce was hunted by Nikhil Chaudhary. 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 KillBounce including community comment highlights and product details, visit the product overview.
Nikhil Chaudhary
Hey Product Hunt 👋
I built KillBounce after getting tired of paying $80+/month for email verification tools that still let bad emails slip through.
The biggest problem? Catch-all domains.
Most verifiers see a catch-all domain, label it "Valid" with high confidence, and move on. Then your campaign goes out, hard bounces pile up, and your sender reputation takes the hit.
KillBounce goes deeper.
Instead of stopping at syntax checks and DNS records, it opens a real SMTP conversation with the receiving server and analyzes how the server actually behaves. That means better detection of risky, catch-all, and undeliverable emails before you send.
✅ Syntax, DNS & MX validation
✅ Live SMTP verification
✅ Better catch-all detection
✅ No monthly subscription
✅ Credits never expire
Pricing starts at just $4 for 1,000 verifications.
I'd love feedback on:
🔹 Is the pricing simple and fair?
🔹 Does the catch-all explanation make sense?
🔹 Is our Trust page useful for security reviews, or unnecessary?
🎁 First 100 Product Hunt commenters get 1,000 free credits just leave a comment and I'll DM you the details.
Try it instantly:
https://www.getkillbounce.com
Looking forward to hearing what you think 🙏