MX lookup: find a domain's mail servers
Enter a domain to see where its email is delivered, in priority order, which provider runs it, and whether every mail host has an address.
Keep your domain on your radar
A one-time check shows today. Pistos DMARC reads the reports mailbox providers send about your domain and tells you when a sender fails or a record changes.
Questions
Why does my domain have several MX records?
Providers publish more than one for redundancy. Senders try the lowest priority number first and fall back to the others.
What if there is no MX record?
Senders fall back to the domain's address record, which usually fails. Publish MX records, or a null MX if the domain takes no mail.
Does this show where my mail is hosted?
It shows where mail to your domain is delivered, which is usually your mail provider. Mail you send may leave from other services.
About this tool
What an MX record is
An MX (mail exchanger) record names the servers that accept mail for a domain. Lower priority numbers are tried first, and higher numbers are backups.
What we check
We list each host, resolve its addresses, recognise common providers such as Google Workspace and Microsoft 365, and flag hosts with no address, MX records that point at an IP, and a missing MX.
Null MX
A domain that sends but never receives mail should publish a null MX (priority 0, host "."), which tells senders to stop trying.