Launching today

MailCheck Email Validation FadSync API

Launching today

FadSync MailCheck Email Validation API

2 followers

FadSync MailCheck Email Validation API

2 followers

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Stop free-trial abuse and database bloat instantly. FadSync MailCheck is an enterprise-grade email validation API that detects and blocks temporary, disposable, and high-risk email addresses before they pollute your system. With an edge-optimized architecture averaging a 50ms response time, our engine instantly recognizes over 40 million burner domains (10MinuteMail, TempMail, etc.) without adding friction to your user onboarding. Trusted by 500+ enterprises.

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Launch tags:API•SaaS•Developer Tools

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Hey Product Hunt! 👋 I'm the founder of FadSync Development Studio. We noticed a massive problem across the SaaS and e-commerce space: platforms were constantly bleeding server resources, proxy bandwidth, and actual revenue due to users creating endless fake accounts with disposable emails just to loop 7-day free trials. We built FadSync MailCheck to plug this exact leak. ⚡ What it does: It’s a simple REST API (just send a GET request) that references a constantly updated database of 40 Million+ burner domains. ⏱️ Performance: It averages a 50ms response time, so it won't slow down your onboarding flows. We've opened up a free tier so developers can test the integration immediately. I’d love to hear your feedback, and I'll be here all day answering any technical questions about our infrastructure or integration methods!

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1d ago

Forum Threads

p/mailcheck-email-validation-fadsync-api

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1d ago

How do you keep authentication flows ultra-fast when adding security checks? ⚡

Hey PH community!

When building sign-up and authentication flows, every extra 100ms of latency can lower conversion rates. However, skipping validation checks leaves your platform wide open to bot registrations and disposable email abuse.

When we built MailCheck API, our primary engineering focus was keeping response times under 50ms at the edge so security checks wouldn't impact the onboarding experience.

Questions for the devs here:

p/mailcheck-email-validation-fadsync-api

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1d ago

We tracked 40M+ disposable email domains—here is how burner emails evolve 🔍

Hey everyone!

Temporary email services like 10MinuteMail and TempMail are evolving fast. Burner domain providers constantly rotate their top-level domains (TLDs) and use custom MX record configurations to bypass standard domain blocklists.

While compiling and maintaining our dataset of 40+ million blocked domains, we noticed a huge surge in temporary emails using non-standard TLDs specifically to bypass basic regex filters on SaaS signup forms.

Curious to hear from founders and product leads:

p/mailcheck-email-validation-fadsync-api

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1d ago

Built an enterprise-grade validation microservice as a solo builder—AMA! 🚀

Hey Product Hunt!

After seeing multiple SaaS platforms waste server resources and proxy bandwidth on fake accounts, I decided to build MailCheck API a high-performance microservice designed to stop trial abuse right at the signup door.

Building high-availability infrastructure with sub-50ms latency as an independent builder came with some great technical challenges.

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