Glossary

MX record

A DNS record that names the mail servers for a domain and their priority.

ValidReach Team · Updated 2026-10-26

In practice

Each record has a priority number and a server name; senders try the lowest number first. A domain with no MX record, and no fallback address record, usually cannot receive mail.

Example

example.test MX 10 mail.example.test means mail for example.test goes to mail.example.test.

Verification and sending

ValidReach reads the MX records for every domain it checks. The free MX lookup tool shows the same data.