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.