MX Record Lookup

Check MX records (mail servers) for any domain across 12 global resolvers. Free real-time DNS propagation checker.

What is an MX record?

An MX record ("mail exchange") tells the world which servers accept email for a domain. Each MX record has a priority (a number) and a host. Lower numbers are tried first; higher numbers are backups. Sending mail servers look up MX, sort by priority, and try each host in order.

When to check MX records

• You just switched email providers (Google Workspace, Microsoft 365, Fastmail, etc.) and need to confirm the new MX is live everywhere
• Email is bouncing and you suspect the MX is misconfigured or stale
• You're hunting down a "spoofed sender" — verify the legitimate MX hosts
• You want to confirm a domain is using a particular mail provider

FAQ

What does the priority number mean?

Lower priority is preferred. 10 mail.example.com is tried before 20 backup.example.com. Equal priorities are load-balanced.

Can MX records point to an IP address?

No. MX records must point to a hostname (which then resolves via A or AAAA records). Pointing MX directly at an IP is a spec violation many mail servers will reject.

What does an empty MX result mean?

The domain doesn't accept email at that name. Some providers use a "null MX" (a single record with priority 0 pointing to .) to explicitly signal "no mail here."