Show HN: Email Verifier CLI/Library
hazzadous Tuesday, November 25, 2025
friend and i were curious what's actually involved in email verification services like usebouncer.com. turns out the basics aren't that complicated.
vibe coded a simple npm package in (mostly) one shot that does:
- syntax validation
- mx record lookup
- smtp mailbox check (without sending emails)
- catch-all domain detection
npx email-reachable user@example.com
works as a library too:
import { verifyEmail } from 'email-reachable'
const result = await verifyEmail('user@example.com')
Summary
Reachable is an open-source software development framework that enables developers to create scalable, fault-tolerant distributed systems. It provides a set of tools and libraries for building reliable, highly available applications that can handle large amounts of data and traffic.
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Summary
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