Instantly look up Mail Exchange (MX) records for any domain — identify mail servers, priority levels, and email routing configuration.
⚡ Quick Lookup Popular Domains
🔄 Querying DNS servers for MX records...
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📧 MX Records
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⭐ Lowest Priority
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📮 Mail Provider
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⏱ TTL (seconds)
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🛡 SPF Status
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🔒 DMARC Status
📋 MX Records Found
🔐 Email Security Records
📮 Detected Mail Provider
🖥 Raw DNS Response
📚 What Are MX Records?
MX (Mail Exchange) records are a type of DNS record that specifies which mail servers are responsible for accepting incoming email messages on behalf of a domain. When someone sends an email to you@yourdomain.com, the sending server performs a DNS MX lookup to find your mail servers and where to deliver the message.
Each MX record contains two key pieces of information: the hostname of the mail server and a priority number (also called preference). Lower priority numbers are preferred — so a mail server with priority 10 will be tried before one with priority 20.
🔑 Key MX Record Concepts
Priority / Preference
A numeric value (0–65535). Lower numbers are higher priority. Used for failover — if priority 10 fails, try priority 20.
Mail Exchange Hostname
The fully qualified domain name (FQDN) of the mail server. Must resolve to an A or AAAA record — never a CNAME.
TTL (Time To Live)
How long (in seconds) DNS resolvers should cache the MX record before querying again. Common values: 300, 3600, 86400.
Backup MX Servers
Having multiple MX records with different priorities provides redundancy. If the primary server is down, email is delivered to the backup server.
🛡 Email Security Records Explained
SPF — Sender Policy Framework
A TXT record that lists authorized mail servers allowed to send email for your domain. Helps prevent email spoofing and phishing. Example: v=spf1 include:_spf.google.com ~all
DKIM — DomainKeys Identified Mail
A digital signature added to outgoing emails that allows receiving servers to verify the email wasn't tampered with in transit. Published as a TXT record under a special subdomain like selector._domainkey.domain.com
DMARC — Domain-Based Auth Reporting
Builds on SPF and DKIM to tell receiving servers what to do when emails fail authentication — reject, quarantine, or allow. Published as a TXT record at _dmarc.yourdomain.com
MX record data is retrieved in real-time using the Google DNS-over-HTTPS API. Results depend on DNS propagation and TTL caching. For authoritative results, always check your domain registrar's DNS panel.
