MX Record Checker
Verify and analyze Mail Exchange (MX) DNS records to ensure proper email routing, server priorities, and deliverability health.
Secure Processing. No data is permanently stored.
Analyzing Domain Routing...
Please wait while we resolve the Mail Exchange targets.
Mail Servers
The SERPInsight MX Record Checker
MX (Mail Exchange) records are vital DNS configurations that tell the world which mail servers are responsible for accepting email messages on behalf of a recipient's domain. Without correct MX records, your domain cannot receive emails.
Developed by SERPInsight, this utility securely queries the public DNS infrastructure to list all configured mail servers for a domain, organized by priority, ensuring your mail infrastructure is correctly mapped and actively resolving.
How to use
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1
Input Domain
Enter your bare domain name (e.g., yourcompany.com) in the field above.
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2
Query DNS
Our system securely contacts the authoritative nameservers to fetch the live MX records.
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3
Review Routing
Verify your server priorities, check IP resolutions, and export the data for your IT team.
Understanding MX Metrics
The preference given to an MX record. Lower numbers indicate higher priority. Senders will always attempt to deliver mail to the lowest number first.
The fully qualified domain name (FQDN) of the mail server handling the messages (e.g., aspmx.l.google.com for Google Workspace).
Ensures that the Target mail server correctly resolves to a valid IP address. An unresolved IP means mail delivery to that server will fail.
Email Optimization Guide
Key Concepts
- Redundancy: Having multiple MX records with different priorities ensures mail isn't lost if your primary server goes down.
- Load Balancing: Assigning the same priority number to multiple servers distributes incoming mail traffic evenly.
- Propagation: Changes to MX records can take anywhere from a few minutes to 48 hours to update globally across all DNS nodes.
Best Practices
- No IP Addresses: MX targets must always be hostnames (domains), never raw IP addresses.
- Avoid CNAME Conflicts: The bare domain (e.g., example.com) cannot be a CNAME record if it also has MX records attached to it.
- Verify SPF & DMARC: While MX dictates receiving, always ensure SPF, DKIM, and DMARC are configured for sending health.
Frequently Asked Questions
Why does my domain show "No MX records found"?
Does priority 0 mean disabled?
How quickly do MX record updates take effect?
Why use SERPInsight?
Professional-grade tools for experts.
Instant Lookups
Direct queries to authoritative DNS servers bypass local cache for real-time results.
Deep Validation
We don't just list the target names; we resolve the IPs to ensure the route is entirely functional.
Complete Privacy
Your queries are processed immediately in-memory and discarded. We do not store lookup history.
Export Ready
Download a clean CSV of your infrastructure mapping with a single click for your records.