Free MX Record Checker
Look up the mail servers responsible for a domain's email.
Need to monitor this across every client domain you manage? ActiScan does bulk scanning, scoring, and white-labeled reporting for MSPs.
What Is an MX Record?
An MX (Mail Exchange) record points to the mail server(s) that accept email for a domain, each with a priority number – lower numbers are tried first. A domain with no MX record can't receive email at all; senders will bounce.
- •Telling other mail servers where to deliver a domain's incoming email
- •Setting failover order across multiple mail servers via priority
- •Confirming a mail platform migration (Google Workspace, Microsoft 365, etc.) actually took effect
Example
10 aspmx.l.google.com.
Priority 10, pointing to Google Workspace's mail infrastructure.
Things to Know
Lower priority number wins
A record with priority 10 is preferred over one with priority 20 – the naming is easy to misread as 'lower priority' meaning less important, when it means tried first.
No MX record isn't always a mistake
A domain that only sends email (never receives it) may deliberately have no MX record, sometimes paired with a null MX (priority 0, target '.') to explicitly signal it can't receive mail.
Next Steps
DMARC Checker
Check the domain's email-authentication policy alongside its mail servers.
DMARC Checker →General DNS Checker
Look up A, AAAA, TXT, CNAME, NS, SOA, CAA, or PTR records too.
General DNS Checker →Frequently Asked Questions
Is this MX record checker free?
Yes – look up MX records for any domain, for free, no signup required.
Why does the mail server name end in a dot?
That trailing dot marks it as a fully-qualified domain name in DNS notation. It's normal and doesn't need to be typed anywhere when configuring mail settings.
I just changed my MX records but mail is still going to the old server
MX changes take time to propagate, bounded by the old record's TTL, and some senders cache resolver results even longer. Give it time before assuming the change failed.
What resolver does this use?
Cloudflare's public DNS-over-HTTPS resolver. Every lookup is live, not a cached snapshot.