Mail servers
We fetch the domain’s MX records and sort them by priority, starting with the server a sender tries first.
MX Lookup
Check MX records
See which servers accept mail for a domain and in what order.
The test queries DNS for MX records and mail server addresses. It does not connect to the servers.
MX report
Test results
IP addresses
For each server we check its A and AAAA records. An MX server without an IP address cannot accept mail.
Cache time
You will see the response TTL: how long resolvers may keep showing the current result after the records change.
Good to know
What is an MX record?
An MX (Mail Exchange) record names the servers that accept mail for a domain. Without it, mail usually goes to the address in the domain’s A record or is not delivered.
What does priority mean?
A lower number means a higher priority. A sender tries the server with the lowest value first and the next ones if it is unavailable. Servers with the same priority share the traffic.
What is a null MX?
The record "0 ." means the domain deliberately accepts no mail.
Why do I see the old result after changing MX?
Resolvers keep the answer until the TTL expires. Compare the change across several resolvers with the DNS propagation tool.