MX Record Checker
Check whether a domain has mail server records, see which hosts receive mail for the domain, and learn what to fix when email cannot be received.
Start Here
Enter a domain and run MX Record Checker.
Review the MX Checker Result
Review the status, warnings, and recommended actions shown in the result panel.
Ready When You Are
Run MX Record Checker to see the MX Checker result and next actions.
About MX Record Checker
MX records tell the internet which mail servers receive email for a domain. They matter when people reply to your campaigns, when confirmation emails need to reach a domain, and when a checked address belongs to a company domain. The MX record checker verifies whether MX records exist, whether they point to usable hosts, and whether the domain has fallback address records. Read DNS, PTR, and Reverse DNS for DNS basics.
A missing MX record does not always break sending from that domain, but it can create reply, signup, or validation problems. If subscribers cannot receive mail at their domain, your campaigns can bounce even if your sender setup is fine. The MX record checker explains whether the receiving side looks ready and when to investigate bounces. The Bounces guide explains how failed delivery affects reputation.
What MX Record Checker Checks
- MX DNS lookup for the domain
- Fallback A and AAAA records when MX is missing
- Mail host count and host names
- Duplicate or unusual MX record values
- Plain-English next steps for missing mail routing
Questions
Does a good MX result prove every inbox exists?
No. MX records show that the domain has mail servers. They do not prove that a specific mailbox such as name@example.com exists.
Should every sending domain have MX records?
A sender domain can technically send without receiving mail, but replies, bounces, and operational trust are easier when the domain can receive mail.