Free MX Record Checker: Instantly Look Up Mail Exchange Records for Any Domain

MX (Mail Exchange) records are the DNS entries that tell the internet which mail servers are responsible for accepting email on behalf of a domain. Without properly configured MX records, email delivery fails entirely.

Use this free MX record checker to instantly look up MX records for any domain, verify priority settings, identify mail providers, and diagnose email delivery issues.

MX Record Checker

Enter a domain name or email address to instantly look up its MX records and mail server configuration.

{{ records.length }} MX Record(s) Found

Domain: {{ checkedDomain }}

No MX Records Found

The domain {{ checkedDomain }} has no MX records configured. Email delivery to this domain will fail.

MX Records for {{ checkedDomain }}

Found {{ records.length }} mail exchange record(s). Lower priority number = higher preference.

{{ records.length > 0 ? 'Mail Can Be Received' : 'No Mail Server Found' }}

Priority	Mail Server (Exchange)	TTL	Status
{{ rec.priority }}	{{ rec.exchange }}	{{ rec.ttl }}s	Active

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What Are MX Records?

Understanding DNS MX Records

MX (Mail Exchange) records are a type of DNS resource record that specifies the mail servers responsible for accepting email messages on behalf of a domain. They tell sending servers where to deliver email destined for that domain.

Each MX record has a priority value (preference number). When multiple MX records exist, mail servers try the one with the lowest priority number first. This allows you to set up primary and backup mail servers for redundancy.

An MX record consists of:

Priority – Lower number = higher preference
Exchange – Hostname of the mail server
TTL – Time-to-live (how long DNS caches the record)

Why Check MX Records?

Common Reasons to Look Up MX Records

Diagnose Delivery Failures

If emails aren't reaching a recipient, missing or misconfigured MX records are often the cause. A quick lookup confirms whether the domain can receive mail at all.

Verify DNS Migration

After migrating email hosting or changing DNS providers, use this checker to confirm your new MX records have propagated correctly worldwide.

Email List Validation

Before sending a campaign, verify that domains in your list have valid MX records. Addresses pointing to domains with no MX records will always bounce.

FAQ

Frequently Asked Questions

What does it mean if a domain has no MX records?

If a domain has no MX records, it cannot receive email. Any attempt to send email to an address at that domain will result in a bounce. This often indicates an inactive domain, a misconfigured DNS, or a domain used only for websites, not email.

Why does a domain have multiple MX records?

Multiple MX records provide redundancy. If the primary mail server (lowest priority number) is unavailable, sending servers automatically try the next one. This ensures email delivery even during outages.

How long does it take for MX record changes to propagate?

DNS propagation typically takes between a few minutes and 48 hours, depending on the TTL (Time-to-Live) value of the previous record and your ISP's DNS caching behaviour.

Can I use this to check bulk domains?

This tool checks one domain at a time. For bulk MX validation across thousands of email addresses, our bulk email verifier performs MX lookups as part of the full verification process.