FREE · MX LOOKUP · NO SIGN-UP
MX record lookup.
Enter a domain to see which servers receive its email and which nameservers answer for it, with SPF, DMARC and the registration expiry date checked in the same pass.
Check a domain
- Registration expiry
- SPF
- DMARC
- Nameservers
- Mail servers (MX)
- TLS certificate
- Checked daily by the monitoring plan, together with new hostnames in certificate logs.
What MX records tell you
MX records name the servers that accept email for a domain, each with a priority number; lower numbers are tried first. They show which provider handles the mail, for example Google Workspace, Microsoft 365 or a self-hosted server.
No MX records
A domain without MX records does not receive email at its own name. That is normal for a domain used only for a website. Even then, publishing SPF v=spf1 -all and a DMARC p=reject policy stops others from sending mail that pretends to come from it.
Nameservers
Nameservers decide who answers DNS questions for the domain. An unexpected nameserver change is often the first sign of a transfer, a takeover or a mistaken migration, and it can silently change your MX records along with everything else.
Checking a migration
After moving email to a new provider, check that the MX records point to the new servers, that SPF includes the new provider, and that DMARC still passes. The checker shows all three at once.
Watch it every day
Domain Watch re-checks nameservers, SPF and DMARC daily for every domain you add and emails you when something changes, so a migration mistake does not go unnoticed for weeks.
Prefer the command line or CI? The same check is available as an open-source CLI (MIT, no dependencies) that can fail a build when a domain is about to expire or loses its DMARC policy.