MX Lookup
Find the mail servers a domain uses to receive email, in priority order.
MX (Mail Exchange) records tell the world which servers accept mail for a domain, in priority order. Lower numbers are tried first. No signup required.
How to use the MX Lookup
- Enter the domain you want to inspect (for example, example.com).
- We query the domain's live MX records from public DNS.
- Review the mail servers and their priority order in the results.
Frequently asked questions
An MX (Mail Exchange) record is a DNS record that tells sending servers which mail servers accept email for a domain, and in what priority order. Lower priority numbers are tried first.
Each MX record has a priority number. Senders try the lowest number first and fall back to higher numbers if it is unavailable, so priority is really a preference order, not a ranking of quality.
A domain with no MX records cannot receive email. This is normal for domains used only for websites or sending, but a mistake for any domain expected to accept mail.
Monitor this automatically
DeliverSignal runs these checks daily and alerts you when something breaks.
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