Glossary

Email checker

A tool that tests whether an email address is valid and can receive mail.

ValidReach Team · Updated 2026-10-26

In practice

Checkers differ in depth. A syntax check only reads the format. A domain check looks up MX records. A mailbox check talks to the receiving server. The best also flag disposable, role and catch-all addresses.

Verification and sending

ValidReach covers all of these levels and returns a status plus flags for each address.