How to Verify an Email Address Without Sending an Email
Syntax check, MX lookup, and the SMTP handshake that confirms a mailbox exists without transmitting anything — how sendless verification works and where it hits limits.
Blog
Research and guides on email verification methods, tools, and deliverability impact.
What Is a Catch-All Email Domain — and Can You Verify It?
Catch-all servers say yes to every address, breaking standard verification. What they are, why 10–20% of B2B addresses sit behind them, and how to send to them safely.
How Often Should You Verify Your Email List? Decay Rates and Re-Verification Windows
B2B lists decay ~2–3% per month. The 30/60/90-day verification windows that keep bounce rates under the reputation threshold.
How to Verify Email Addresses: The Complete Guide for 2026
Every verification method explained — syntax checks, MX lookups, SMTP validation, and catch-all detection — with accuracy benchmarks.
Best Email Verification Tools Compared: Accuracy and Pricing (2026)
10 email verification tools tested against 50,000 addresses — accuracy rates, speed, pricing, and API capabilities compared.
How Email Verification Reduces Bounce Rates: Data from 1 Million Sends
Before-and-after analysis of bounce rates, deliverability, and domain reputation for campaigns with and without email verification.