MX Lookup

List a domain's mail servers in priority order.

Related tools

SPF CheckerFetch and validate a domain's SPF record, with the 10-lookup limit in mind.DMARC CheckerRead and explain a domain's DMARC policy (p, rua, pct, alignment).Email VerifierValidate an address: syntax, domain MX, role/disposable, live mailbox probe.DNS LookupDig-style lookup for A, AAAA, MX, TXT, NS, SOA, SRV, CAA, PTR — plus subdomain sweep.Blacklist CheckCheck an IP against major DNS blacklists (RBLs).

Frequently asked questions

What is an MX record?

An MX (Mail Exchange) record tells other mail servers where to deliver email for your domain, and in what priority order.

What does MX priority mean?

Lower numbers are tried first. Servers with equal priority share load. If the primary is unreachable, senders fall back to the next-lowest priority.

What if a domain has no MX record?

Senders fall back to the domain's A record (an "implicit MX"). If there is neither, the domain cannot receive email.