MX Record Lookup
Find the mail servers (MX records) responsible for a domain and confirm they resolve to an address — a basic sanity check for any sending or receiving domain.
Want the full picture? Run a complete spam test — it checks MX lookup plus everything else against your actual email and scores it 0–10.
Frequently asked questions
What is an MX record?
An MX (Mail eXchanger) record tells other servers where to deliver email for your domain, in priority order (lowest number first).
No MX record — is that bad?
For a sending domain it's a red flag (often disposable/misconfigured). Receivers fall back to the A record only when no MX exists.