MX (Mail Exchange) records are DNS records that specify which mail servers are responsible for receiving email for a domain. Each MX record has a priority number — lower numbers mean higher priority.

Why are there multiple MX records?

Multiple MX records provide redundancy. If the primary mail server (lowest priority number) is unavailable, the sending server tries the next one. This ensures email delivery even if one server is down.

What does the priority number mean?

The priority (also called preference) is a number that indicates the order mail servers should be tried. A lower number means higher priority. A server with priority 10 is tried before one with priority 20.

How do I check if email will be delivered to my domain?

Look up your domain's MX records. If at least one record points to a valid mail server that is online and configured to accept mail, email should be delivered. Also verify SPF and DMARC records.

What does MX priority mean?

A lower MX priority number means higher preference. If the primary MX (priority 10) is unavailable, sending servers try the next lowest priority (e.g., priority 20). Having multiple MX records provides redundancy.

My email is broken — what should I check in MX records?

Verify the MX hostname matches exactly what your email provider requires. Check there are no extra spaces, typos, or missing trailing periods. Verify the TTL has expired if you recently made changes.

MX Lookup — Check Mail Exchange Records for Any Domain Free

Look up MX records for any domain to see which mail servers handle its email. Shows priority, hostname, and TTL. Free, instant.

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MX records specify which mail servers handle email for a domain. Lower priority numbers have higher preference. Queries use Google Public DNS.

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What is MX Lookup — Check Mail Exchange Records Free?

An MX (Mail Exchange) lookup retrieves the DNS MX records for a domain, which specify the mail servers responsible for accepting email on behalf of that domain. Each MX record has a priority value — lower numbers have higher priority. This tool is essential for diagnosing email delivery problems, verifying email provider configuration, and auditing email infrastructure.

How to Use MX Lookup — Check Mail Exchange Records Free

1Enter the domain you want to check (e.g., example.com).
2Click Lookup to retrieve the MX records.
3Review each MX record: hostname, priority, and TTL.
4Verify the mail server hostnames match your email provider's documentation.
5Check priority values — primary MX should have the lowest number.

Key Features

All MX records with priority and TTL
Resolves MX hostnames to IP addresses
Multiple MX record support
Instant DNS lookup

Benefits

Diagnose email delivery failures by verifying MX configuration
Confirm new email provider's MX records are live after migration
Research which email service a domain uses
Verify backup MX records for redundancy

Why Use Irreva for MX Lookup — Check Mail Exchange Records Free?

Diagnose email delivery failures by verifying MX configuration

Confirm new email provider's MX records are live after migration

Research which email service a domain uses

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