MX Lookup
ServerFind a domain's mail servers and their priority order.
How it works
Look up a domain's MX (mail exchanger) records — the servers that accept its email — with their priority order. A domain with no MX records can't receive mail at all.
Try an example
This check runs from our server so it can query DNS directly — the domain you enter is sent to our backend. Nothing is stored.
How this works: the domain you enter is sent to our server so it can query DNS directly and see what a receiving mail server sees. Nothing is stored.
About the MX Lookup
MX (mail exchanger) records tell the internet which servers accept email for a domain. This free MX lookup shows every MX record with its priority, so you can confirm mail is routed where you expect — or diagnose why it isn't arriving.
A domain with no MX records cannot receive email at all.
How MX priority works
Each MX record carries a number. Sending servers try the lowest number first and fall back to higher ones if it's unreachable, so the lowest value is your primary mail server and the rest are backups. The numbers themselves are arbitrary — only their relative order matters.
Frequently asked questions
What is an MX record?
A DNS record naming the mail servers that accept email for a domain, each with a priority. Without one, other servers have nowhere to deliver your mail.
What does the priority number mean?
Lower is tried first. A record with priority 10 is used before one with 20, which acts as a backup. The actual numbers don't matter, only their order.
Why does my domain have no MX records?
Either mail isn't set up for it, or the records were removed. Some domains are deliberately send-only or parked, in which case that's expected.
Can I have more than one MX record?
Yes, and most providers give you several for redundancy — if the primary is down, senders retry the next in priority order.