Domain checks
MX checker
MX records say which servers receive mail for a domain, and in what order senders should try them. A sending domain that cannot receive replies looks like spam, so this lists yours and flags a missing or null MX record.
Free, no signupLive DNS
MX checkerLive DNS
Where mail to your domain goes, in the order senders try it. A sending domain that cannot receive replies looks like spam.
Enter a domain to list its mail servers.
How it works
What this checks, and how.
- We look up the MX records for the domain.
- We list each mail server with its priority, lowest first, which is the order senders try them.
- A domain with no MX, or a single null MX that says it receives no mail, shows up as a finding.
Questions
Quick answers.
What does the priority number mean?
Senders try the server with the lowest number first and fall back to higher numbers if it does not answer. Servers with the same number share the load.
What is a null MX?
A single MX record with priority 0 and no host. It tells senders the domain does not receive mail.
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Start freeSee pricing
- Free plan, no time limit
- 7-day trial on paid plans
- 30-day inbox guarantee, with conditions
- Customer data is hosted in the EU