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Blacklist & DNSA free tool by NullFortis
MX Lookup
Inspect your mail servers
What is it?
MX (Mail Exchange) records tell the internet which servers actually receive email for your domain, and in what priority order.
Why it matters
Every other email check assumes mail can actually be routed somewhere — MX is the most basic 'can this domain receive mail at all' check there is.
Impact if ignored
Missing or misconfigured MX records mean your domain simply can't receive email at all — bounced messages, broken password resets, lost customer replies.
Common use cases
- Confirm DNS changes took effect after migrating providers
- Verify priority/failover ordering across multiple mail servers
- Diagnose reports that mail never arrived