What is an MX Lookup Tool?
An MX lookup tool is a free MX lookup tool and DNS record checker that queries DNS servers to retrieve the mail exchange records responsible for receiving email for any domain name. An MX record — short for Mail Exchange record — is a type of DNS record that specifies which mail servers are responsible for receiving email messages on behalf of a domain.
Every MX record contains a target hostname and a priority value. When email is sent, the sending mail server queries the domain's DNS and attempts delivery to the server with the lowest priority number first, falling back to higher-priority entries if needed. Our MX lookup tool surfaces all of that — plus resolved IP addresses, TTL values, and related DNS authentication records — in one place.
SPF · DKIM · TTL 3600
Why Use Our MX Lookup Tool?
Check MX records for any domain and get the full picture of your email setup instantly
Real-Time MX Record Checks
Query DNS for mail exchanger records and get up-to-date answers within seconds. Check the MX records for any domain name without installing nslookup or running terminal commands on Mac OS or Linux.
Troubleshoot Email Delivery
Identify misconfigured MX priorities, missing records, or targets pointing to deprecated email servers that silently block incoming mail and cause email delivery issues.
Comprehensive DNS Diagnostics
Combine MX record lookup with DNS A/AAAA, SPF, DKIM, and DMARC checks to get a complete view of how your domain's DNS is configured for email routing and authentication.
Simple and Developer-Friendly
Clear, structured output suitable for administrators, developers, and IT support teams. Find MX records online without complex tooling or DNS server access.
Features
Everything a robust MX record checker and DNS lookup tool should surface
MX Record Details
See every MX entry, its priority number, target hostname, and resolved IP address. Multiple MX records with different priorities are displayed in order so you can instantly understand your primary, secondary, and backup MX routes. Provider fingerprinting translates raw hostnames into plain-language labels — no need to manually decode aspmx.l.google.com or mail.protection.outlook.com.
DNS Resolution
Resolve MX targets to A/AAAA records and detect mismatches or CNAME chains that may cause email delivery failures. Verify the correct mail server IP address is reachable before you configure or migrate.
SPF & DKIM Insights
Surface SPF records and DKIM selectors associated with your domain name to confirm outbound email authentication is configured correctly and protect your domain from spoofing.
Propagation & TTL
View time to live (TTL) values and propagation status across DNS servers to know exactly when DNS changes will take effect globally — critical after any MX DNS record update or mail server migration.
How the MX Lookup Tool Works
Check MX records for your domain in four straightforward steps
Enter a Domain or Hostname
Type any domain name, full URL, or email address into the search field. The MX checker normalizes the input to the underlying domain and initiates a DNS MX record lookup automatically.
DNS Query Runs
The tool queries DNS servers to retrieve MX records and related DNS entries — including A/AAAA resolution, SPF TXT records, DKIM selectors, and CNAME chains — for the records associated with your domain.
Results Are Displayed
Results show MX priorities, target mail servers, resolved IP addresses, TTL values, load balancing configuration, and any authentication records found — structured for quick scanning and deep inspection alike.
Diagnose and Fix
Use the diagnostics panel to troubleshoot and correct MX records for your domain: update MX priorities, add missing DNS records, correct SPF or DKIM entries, or confirm a valid MX configuration after a provider migration.
Who Benefits from This Tool?
A free MX lookup tool and DNS record checker built for every role that touches email
Email Administrators
Validate mail exchanger configuration before migrating or changing providers. Confirm correct MX records, higher priority routing, and that mail servers are responsible for receiving email before cutting over DNS.
Web Developers
Confirm DNS settings after deployments to avoid lost email traffic. Use the MX checker tool to verify that a domain's DNS is routed to the correct email server before launch.
Support Teams
Quickly triage customer email delivery problems with clear DNS evidence. A DNS MX record lookup gives support teams the mx preference, IP address, and server status they need without escalating to engineering.
Small Business Owners
Ensure business emails are routed correctly and authenticated to prevent spoofing. Use the MX lookup tool to verify that MX records for your domain are pointing to the right email server and that SPF is in place.
Frequently Asked Questions
Common frequently asked questions about MX records and DNS lookups
What is an MX record?
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A mail exchange record is a DNS record that specifies which mail servers are responsible for receiving email messages for a domain name. Each MX record contains a target hostname and a priority value. The mail exchange record type is one of the most critical DNS record types for any domain that sends or receives email.
Why are MX priorities important?
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MX priorities determine the order in which mail servers are tried when delivering email. A lower value means higher priority — the sending server always tries the server with the lowest priority number first. Multiple MX records with different priorities provide redundancy and failover so that a backup MX handles delivery if the primary mail server is unavailable.
How can I fix email delivery problems?
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Use the MX lookup to identify incorrect MX targets, missing A/AAAA records for resolved hostnames, or DNS TTL issues slowing propagation. Then verify SPF, DKIM, and DMARC are configured to prevent rejection or spam filtering. Correct MX records and valid authentication records together cover most email delivery issues.
Can I check MX records on Linux or Mac OS without a tool?
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Yes — you can use nslookup or dig on Linux and Mac OS to perform a DNS MX record lookup from the command line. However, our MX checker tool surfaces the same DNS mx data alongside resolved IPs, SPF insights, TTL, and provider identification in one readable view — no terminal required.