Free MX Record Lookup & Mail Server Check
MX records tell other servers where to deliver mail addressed to your domain. They govern receiving, not sending — but a broken MX means bounce notifications and replies never reach you, which makes sending problems invisible.
Worked example — example.com
Sample demonstration- PassRecords found
3 - PassPrimary
10 · aspmx.l.google.com - PassBackups
20 · alt1 · 30 · alt2Distinct priorities, correctly ordered.
- PassCNAME targets
noneAn MX pointing at a CNAME is invalid and some servers reject it.
Healthy — three exchangers with distinct priorities, all resolving.
SadaSend runs these checks continuously on your sending domains, and refuses to send until they pass — so mail Gmail would reject never leaves.
Start freePredefined Real-World Test Scenarios
Live verification vectorsSingle high-capacity mail exchanger (smtp.google.com) at priority 10.
Five distributed mail exchangers with distinct priority weights (1 through 10).
Validates primary and backup mail exchangers configured for sadasend.com.
What this checks
- MX records exist and resolve to real hosts
- Priorities are distinct and ordered sensibly
- No MX points at a CNAME, which is invalid
- Every target resolves to an A or AAAA record
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