Master the art of email deliverability.
A technical reference on email authentication: how SPF, DKIM and DMARC work, their DNS records, alignment, policies, and a safe p=none to reject rollout.
What is an MX record and how does email routing work? A technical guide to DNS email infrastructure, MX priority, null MX, and how verification uses MX lookups.
Compare KaijuVerifier against ZeroBounce, Hunter.io, and NeverBounce. Speed, accuracy, and price comparison.
Optimize email verification performance and speed at scale: async batch jobs, dedupe, caching, backoff and concurrency to verify emails fast without 429s.