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MX Lookup
Enter a domain to see where its email is delivered: the MX records in priority order, the IP addresses each one resolves to, which provider runs them, and anything that would stop mail arriving.
What this does - and doesn’t - tell you
What’s checked
- The MX records in priority order, and whether the domain has any
- Whether every MX host resolves to an IP address
- MX targets that are CNAMEs or bare IPs, both invalid
- The mail provider behind the records (Google Workspace, Microsoft 365, Zoho and others)
Worth knowing
- A sending-only domain is often better with a null MX, which tells the world it doesn't take mail. A domain people write to needs real ones.
- This reads DNS only. It doesn't connect to the mail server, so it can't tell you whether the server is up right now.
- For SPF, DKIM, DMARC and MX in one report, use the Domain Health Check.
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