MX Record Lookup
Look up the mail servers (MX records) for any domain — sorted by priority.
Quick answer: Look up the mail servers (MX records) for any domain — sorted by priority.
Last updated
Frequently asked questions
- What are MX records and why do they matter?
- MX (Mail Exchanger) records tell sending mail servers which host accepts mail for a domain. If they're missing or wrong, no email gets through.
- Why does this run on a server?
- Browsers can't make DNS queries directly — DNS uses UDP, which JavaScript has no API for. Our server makes the query in milliseconds and forwards the result.
- What does priority mean?
- Lower numbers are tried first. If multiple MX records share a priority, mail servers load-balance between them.
- Will you query private domains?
- We refuse private (RFC1918) IPs and intranet TLDs to avoid being used as a probe inside corporate networks. Public domains only.
- Is there a rate limit?
- Yes — about 60 lookups per minute per IP. Email us if your team needs a higher allowance.