Glossary
Email validation
Checking that an address is correctly formed.
ValidReach Team · Updated 2026-10-26
In practice
Validation in the narrow sense is a format check: one @, a plausible domain, allowed characters. Do not be too strict: plus signs, long domain endings and new top-level domains are all legal. A correctly formed address may still not exist.
Verification and sending
Validation is the first step of verification. Verification goes on to check the domain and the mailbox.