MX Lookup

MX Lookup Tool

Check Mail Exchange Records - Verify Email Server Configuration Instantly

What is the MX Lookup Tool?

The MX Lookup Tool is a free online utility that retrieves and displays MX (Mail Exchange) records for any domain, showing which mail servers are responsible for receiving email messages. MX records are critical DNS entries that tell the internet where to deliver emails sent to your domain.mxtoolbox+3​

Whether you're an email administrator configuring mail servers, a webmaster troubleshooting email delivery issues, a system administrator verifying DNS settings, or a developer integrating email services, the CyberTools MX Lookup Tool provides instant, accurate information about any domain's email infrastructure.dnschecker+1​

How to Use the MX Lookup Tool

Using our MX record checker is simple and delivers results in seconds:bettermerge+1​

Step 1: Enter the Domain Name

Input the domain whose mail servers you want to check:zoho+1​

• Domain only: example.com, gmail.com, yourcompany.com
• No www: Don't include www. or http://bettermerge​
• No email addresses: Enter domain only, not user@example.com
• International domains: Works with all TLDs (.com, .org, .io, etc.)

Step 2: Select DNS Server (Optional)

Choose which DNS server to query:dnschecker​

• Google DNS: 8.8.8.8 (default, fast and reliable)
• Cloudflare DNS: 1.1.1.1 (privacy-focused)
• OpenDNS: 208.67.222.222
• Your local DNS: Check what your ISP sees
• Authoritative DNS: Query domain's nameservers directlymxtoolbox​

Why test different servers?

• Verify DNS propagation after changes
• Check consistency across resolvers
• Troubleshoot regional issuesdnschecker​

Step 3: Click "Check MX Records"

Our tool instantly queries DNS servers to retrieve:mxtoolbox+2​

• All MX records for the domainmxtoolbox​
• Priority values for each mail serverbettermerge+1​
• Hostname of each mail exchange serverbettermerge​
• IP addresses of mail serversdnschecker+1​
• TTL (Time To Live) valuesbettermerge​

Step 4: Analyze the Results

You'll receive comprehensive information including:dnschecker+1​

MX Record Details:

• Priority (Preference): Lower number = higher prioritycopernica+2​
• Mail Server Hostname: FQDN of the mail exchange servercopernica+1​
• IP Address: Resolved IPv4/IPv6 addressdnschecker+1​
• TTL: Cache duration in secondsbettermerge​
• Provider Detection: Identifies email service (Google Workspace, Microsoft 365, etc.)

Additional Insights:

• Multiple mail servers for redundancyabnormal​
• Backup server configuration
• Load balancing setup
• Email provider identification
• IP blacklist status checkdnschecker​

What Are MX Records?

MX (Mail Exchange) records are DNS entries that specify which mail servers handle incoming email for a domain. They are essential for email delivery and tell sending mail servers where to deliver messages addressed to your domain.easydmarc+2​

How MX Records Work

The email delivery process using MX records follows these steps:abnormal​

Step 1: Email Sent

• Someone sends an email to user@example.comabnormal​
• Sender's mail server needs to find where to deliver it
• Mail Transfer Agent (MTA) initiates lookup

Step 2: DNS Query (MX Lookup)

• Sender's mail server performs MX record queryabnormal​
• Queries DNS for example.com mail exchange recordsmxtoolbox​
• DNS returns all MX records with prioritiesdnschecker​

Step 3: Priority Selection

• Mail server selects MX record with lowest priority number (highest priority)abnormal+1​
• Example: Priority 10 is tried before Priority 20copernica​
• If primary fails, tries next priority serverabnormal​

Step 4: IP Resolution

• MX record provides hostname (e.g., mail.example.com)copernica​
• A record lookup converts hostname to IP addresscopernica​
• Sender's server now knows exact IP to connect to

Step 5: SMTP Connection

• Establishes SMTP (Simple Mail Transfer Protocol) connectionabnormal​
• Authenticates and transmits message
• Target server accepts email for delivery

Step 6: Email Delivered

• Recipient's mail server receives the messageabnormal​
• Email stored in mailbox
• User can access through email client

This entire process happens in seconds, making email delivery seamless.abnormal​

MX Record Structure

Typical MX record format:copernica+1​

text
example.com.    3600    IN    MX    10 mail.example.com.
example.com.    3600    IN    MX    20 mail2.example.com.

Components explained:

• example.com. – Domain name (with trailing dot)
• 3600 – TTL (Time To Live) in secondsbettermerge​
• IN – Internet class (standard)
• MX – Record type (Mail Exchange)
• 10, 20 – Priority/preference valuecopernica+1​
• mail.example.com. – Mail server hostnamecopernica​

MX Record Priority (Preference)

Priority determines mail server selection order:bettermerge+2​

How priority works:

• Lower number = HIGHER prioritybettermerge+1​
• Priority 10 mail server is tried BEFORE priority 20
• If equal priority, mail servers are tried in random order
• Backup servers have higher priority numbersabnormal​

Common priority configurations:

Single mail server:

text
example.com.    MX    10 mail.example.com.

All email goes to one server (no redundancy).

Primary + Backup:

text
example.com.    MX    10 mail1.example.com.
example.com.    MX    20 mail2.example.com.

Primary server tried first; backup used if primary fails.abnormal​

Load Balancing:

text
example.com.    MX    10 mail1.example.com.
example.com.    MX    10 mail2.example.com.
example.com.    MX    10 mail3.example.com.

Equal priority distributes load across servers.abnormal​

Enterprise Configuration:

text
example.com.    MX    10 primary.example.com.
example.com.    MX    20 backup1.example.com.
example.com.    MX    30 backup2.example.com.

Primary with multiple backup tiers for maximum reliability.abnormal​

Why Use MX Lookup?

1. Troubleshoot Email Delivery Issues

Diagnose why emails aren't arriving:dnschecker​

Common email problems MX lookup helps solve:

• No emails received: Check if MX records exist at alleasydmarc​
• Bounced messages: Verify mail server hostnames are correct
• Delayed delivery: Identify misconfigured or slow mail servers
• Partial failures: See if backup servers are properly configured
• Spam folder issues: Check if mail server IPs are blacklisteddnschecker​

Example scenario: Company migrated email to Google Workspace but forgot to update MX records—MX lookup immediately reveals old mail server still configured.

2. Verify Email Configuration After Changes

Confirm DNS updates took effect:dnschecker​

Critical times to check MX records:

• After domain migration – Ensure emails route to new provider
• Switching email providers – Verify Google to Microsoft 365 migration
• Adding backup mail servers – Confirm redundancy is activeabnormal​
• DNS propagation monitoring – Check if changes spread globallydnschecker​
• Domain transfer completion – Validate email still works

Propagation timeline: MX record changes can take 24-48 hours to fully propagate based on TTL values.bettermerge​

3. Configure New Domain Email Services

Set up email for new domains correctly:easydmarc​

Email setup workflow:

1. Register domain with registrar
2. Choose email provider (Google Workspace, Microsoft 365, custom)
3. Get MX records from email provider documentation
4. Add MX records to DNS configuration
5. Use MX lookup to verify configurationdnschecker​
6. Test email by sending and receiving messages
7. Configure SPF, DKIM, DMARC for security

Our tool confirms your MX records are visible before going live.dnschecker​

4. Identify Email Service Providers

Discover which email platform a domain uses:

Provider identification:

• Google Workspace: MX records like aspmx.l.google.combettermerge​
• Microsoft 365: MX records like *.mail.protection.outlook.com
• Zoho Mail: MX records like mx.zoho.comzoho​
• Custom servers: Self-hosted mail infrastructure
• Third-party: Rackspace, ProtonMail, FastMail, etc.

Business intelligence applications:

• Competitive analysis of competitor email infrastructure
• Lead qualification (enterprise vs free email)
• Technology stack research
• Partnership opportunity identification

5. Email Security Auditing

Assess email security configuration:

Security checks:

• Multiple redundant servers: Ensure backup mail servers existabnormal​
• IP reputation: Check if mail server IPs are blacklisteddnschecker​
• Provider security: Verify reputable email service usage
• Configuration errors: Identify misconfigurations exposing vulnerabilities
• SPF/DKIM alignment: Ensure mail servers match authentication records

6. Mail Server Redundancy Verification

Confirm backup servers protect against downtime:abnormal​

Redundancy best practices:

• Minimum 2 MX records for any production domainabnormal​
• Geographic distribution – Servers in different locations
• Different priorities – Clear primary and backup hierarchyabnormal​
• Independent infrastructure – Backups on separate networks
• Regular testing – Verify backup servers actually work

Example: Company has single mail server; power outage = total email downtime. Multiple MX records prevent this.abnormal​

7. Email Migration Planning

Prepare smooth email provider transitions:

Migration checklist:

• Document current MX records before changes
• Plan TTL reduction (lower to 300 seconds before migration)
• Stage new mail servers and test before DNS changes
• Coordinate MX record updates with migration window
• Monitor with MX lookup during transitiondnschecker​
• Verify new configuration immediately after changes
• Keep old servers active for TTL duration as fallback

8. Domain Purchase Due Diligence

Research domains before acquisition:

Pre-purchase investigation:

• Check if domain has existing email infrastructure
• Verify no email services will be disrupted
• Identify any email forwarding or aliases configured
• Assess email reputation of associated IPs
• Understand existing email commitments

Common Use Cases

Email Administrators

Daily email management tasks:

• Verifying mail server configuration after updatesdnschecker​
• Troubleshooting email delivery failures
• Monitoring DNS propagation of MX changes
• Documenting email infrastructure
• Testing backup mail server functionalityabnormal​
• Auditing multi-domain email environments

System Administrators

Infrastructure management:

• Configuring mail servers for new domainseasydmarc​
• Validating DNS configuration changes
• Documenting disaster recovery procedures
• Planning email service migrations
• Maintaining network documentation
• Testing email routing functionality

Web Developers

Application development:

• Validating email domains for user registration
• Testing contact form email delivery
• Configuring transactional email services
• Debugging webhook email notifications
• Verifying API email integration
• Testing email validation logic

Security Analysts

Security operations:

• Investigating phishing email sources
• Verifying email authentication configuration
• Checking mail server IP reputationdnschecker​
• Auditing email security policies
• Analyzing spam attack patterns
• Researching malicious domains

Digital Marketers

Email marketing operations:

• Verifying sender domain configuration
• Troubleshooting email campaign delivery
• Checking competitor email infrastructure
• Validating email list domains
• Testing email authentication setup
• Monitoring deliverability factors

IT Support Teams

Technical support:

• Diagnosing customer email issuesdnschecker​
• Providing email configuration assistance
• Verifying correct DNS setup
• Troubleshooting "email not working" tickets
• Guiding users through provider changes
• Documenting support resolution steps

Features of CyberTools MX Lookup Tool

✅ Free and Unlimited

• No registration required – Start checking immediatelydnschecker​
• Unlimited lookups – No daily or monthly limits
• Completely free – All features at no costdnschecker​
• No credit card – Zero payment information needed

🌐 Comprehensive DNS Queries

• Authoritative DNS queries – Direct to domain's nameserversmxtoolbox​
• Multiple DNS server options – Test from different resolversdnschecker​
• Real-time results – Always current datamxtoolbox​
• Global perspective – Check worldwide propagation

⚡ Instant Results

• 1-2 second response timebettermerge+1​
• No waiting queues – Immediate processing
• Real-time DNS lookups – Fresh data every querymxtoolbox​
• Fast interface – Optimized for speed

🔍 Detailed Information

Complete MX record data:bettermerge+1​

• All MX records for the domainmxtoolbox​
• Priority values clearly displayedbettermerge​
• Mail server hostnames fully qualifiedbettermerge​
• IP address resolution automaticbettermerge+1​
• TTL values for each recordbettermerge​
• Provider identification automatic detection

🛡️ Security Features

• IP blacklist checking – Verify mail server reputationdnschecker​
• Multiple blacklist databases – Check 50+ anti-spam listsdnschecker​
• Security risk assessment – Identify vulnerabilities
• SPF record validation – Cross-check authentication
• DMARC compatibility – Ensure alignment

📊 Clear Result Presentation

• Color-coded priorities – Visual hierarchybettermerge​
• Organized display – Easy to read format
• Copy-paste friendly – Quick data extraction
• Export options – Save results for documentation
• Print-friendly – Generate reports

🔄 Additional DNS Records

Check related records simultaneously:zoho​

• A records – Mail server IP addressescopernica​
• AAAA records – IPv6 addresses
• SPF records – Email authentication
• DKIM records – Sender verification
• DMARC records – Email policy
• TXT records – Additional information

📱 Mobile-Friendly

• Responsive design – Perfect on all devices
• Touch-optimized – Easy mobile use
• Quick checks – Fast on mobile networks
• Same features – Full functionality everywhere

💡 User-Friendly Interface

• Simple input – Just domain name neededzoho+1​
• Clear instructions – No technical expertise requireddnschecker​
• Helpful explanations – Understand the results
• Visual indicators – Status at a glance
• Error messages – Clear troubleshooting guidance

Understanding MX Lookup Results

Successful MX Record Configuration

text
Domain: example.com

MX Records Found:
Priority: 10
Hostname: aspmx.l.google.com
IP Address: 142.250.185.26
TTL: 3600 seconds

Priority: 20
Hostname: alt1.aspmx.l.google.com
IP Address: 142.250.110.26
TTL: 3600 seconds

Priority: 30
Hostname: alt2.aspmx.l.google.com
IP Address: 142.250.153.27
TTL: 3600 seconds

Status: ✅ Properly Configured
Provider: Google Workspace
Redundancy: Yes (3 mail servers)
Blacklist Status: Clean

What this means:
✅ Domain has proper MX records configuredeasydmarc​
✅ Multiple mail servers for redundancyabnormal​
✅ Clear priority hierarchy – Primary and backupsabnormal​
✅ Google Workspace handles emailbettermerge​
✅ Professional setup following best practicesabnormal​

No MX Records Found

text
Domain: brokenemailexample.com

MX Records: None Found
Status: ❌ No Mail Exchange Records

Error: NXDOMAIN or No MX Records Configured

What this means:
❌ Domain cannot receive emaileasydmarc​
❌ No mail servers configured
❌ DNS not set up for email
❌ Email will bounce if sent to this domaineasydmarc​

Possible causes:

• Domain recently registered, DNS not configured yet
• Email not set up for this domain
• MX records deleted accidentally
• DNS propagation pending (wait 24-48 hours)
• Domain expired or suspendedeasydmarc​

Single MX Record (No Redundancy)

text
Domain: smallbusiness.com

MX Record Found:
Priority: 10
Hostname: mail.smallbusiness.com
IP Address: 203.0.113.50
TTL: 86400 seconds

Status: ⚠️ Single Mail Server (No Redundancy)
Provider: Self-Hosted
Backup: None Configured

What this indicates:
⚠️ Email works but vulnerable to downtimeabnormal​
⚠️ No backup server if primary failsabnormal​
⚠️ Single point of failure – server outage = no email
⚠️ Not best practice for production environments
⚠️ Consider adding backup MX recordabnormal​

Recommendation: Add second MX record with priority 20+ for redundancy.abnormal​

Misconfigured Priority

text
Domain: confusedsetup.com

MX Records:
Priority: 10
Hostname: mail1.confusedsetup.com
IP Address: 198.51.100.10

Priority: 5
Hostname: mail2.confusedsetup.com
IP Address: 198.51.100.20

Status: ⚠️ Unusual Priority Configuration

What this indicates:
⚠️ Lower priority number tried firstbettermerge+1​
⚠️ Mail2 (priority 5) is PRIMARY, not mail1
⚠️ Possibly unintentional configuration
⚠️ May indicate migration in progress
⚠️ Verify intended mail server order

Common mistake: Administrators sometimes misunderstand that lower = higher priority.bettermerge​

Multiple Equal Priority (Load Balancing)

text
Domain: highvolume.com

MX Records:
Priority: 10
Hostname: mx1.highvolume.com
IP Address: 192.0.2.10

Priority: 10
Hostname: mx2.highvolume.com
IP Address: 192.0.2.20

Priority: 10
Hostname: mx3.highvolume.com
IP Address: 192.0.2.30

Status: ✅ Load Balanced Configuration

What this means:
✅ Load balancing across multiple serversabnormal​
✅ Equal priority – random distribution
✅ High availability setup
✅ Enterprise-grade configurationabnormal​
✅ Handles high volume email efficiently

MX Records vs Other DNS Records

MX vs A Recordcopernica​

MX Record:

• Purpose: Specifies mail server for domaincopernica​
• Points to: Hostname (e.g., mail.example.com)copernica​
• Use: Email delivery routingeasydmarc​
• Required for: Receiving emaileasydmarc​

A Record:copernica​

• Purpose: Maps hostname to IPv4 addresscopernica​
• Points to: IP address (e.g., 93.184.216.34)
• Use: Web hosting, mail server resolutioncopernica​
• Required for: Accessing servers by name

Relationship: MX record points to hostname → A record resolves hostname to IP.copernica​

MX vs CNAME Recordcopernica​

MX Record:

• Cannot point to CNAME (RFC violation)copernica​
• Must point to A or AAAA record directlycopernica​
• Specifically for mail routing

CNAME Record:copernica​

• Creates alias to another hostnamecopernica​
• Used for subdomains (www, ftp, etc.)copernica​
• Cannot be used as MX target

Important: MX records MUST point to A/AAAA records, never CNAME.copernica​

MX vs SPF/DKIM/DMARC

MX Records:

• Control inbound email routingeasydmarc+1​
• Tell senders where to deliver mail
• Required for receiving emaileasydmarc​

SPF/DKIM/DMARC:

• Control outbound email authentication
• Prevent email spoofing and phishing
• Improve deliverability
• Optional but highly recommended

Both needed for: Complete email security and functionality.

Common MX Record Issues and Solutions

Problem: Emails Not Being Received

Symptoms:

• No emails arriving at domain
• Sender gets bounce messages
• Complete email blackout

Diagnosis with MX lookup:

• Check if MX records exist at alleasydmarc​
• Verify mail server hostnames are correct
• Confirm IP addresses resolve properly
• Test multiple DNS servers for consistency

Solutions:

• Add MX records if missingeasydmarc​
• Correct typos in mail server hostnames
• Update expired or incorrect MX records
• Wait 24-48 hours for DNS propagation
• Contact hosting provider for assistance

Problem: Intermittent Email Delivery

Symptoms:

• Some emails arrive, others don't
• Delayed message delivery
• Inconsistent performance

Diagnosis:

• Check if backup mail servers configuredabnormal​
• Verify priority values are correctbettermerge​
• Test mail server IP blacklist statusdnschecker​
• Confirm all mail servers are online

Solutions:

• Add backup MX records for redundancyabnormal​
• Fix incorrect priority numberingbettermerge​
• Remove blacklisted IPs from spam databases
• Balance load across multiple serversabnormal​

Problem: Emails Going to Spam

Symptoms:

• Delivered emails land in spam folders
• Recipients don't see messages
• Email reputation declining

Diagnosis:

• Check mail server IP reputationdnschecker​
• Verify IP not on blacklistsdnschecker​
• Confirm SPF records match MX servers
• Test DKIM and DMARC configuration

Solutions:

• Request delisting from blacklist databasesdnschecker​
• Fix SPF/DKIM/DMARC authentication
• Use reputable email service provider
• Implement proper email authentication
• Monitor sender reputation scores

Problem: DNS Propagation Delays

Symptoms:

• MX changes not visible everywhere
• Inconsistent lookups from different locations
• Old mail servers still receiving email

Diagnosis:

• Test from multiple DNS serversdnschecker​
• Check TTL valuesbettermerge​
• Verify authoritative nameservers updatedmxtoolbox​
• Compare results globally

Solutions:

• Lower TTL before making changesbettermerge​
• Wait full TTL duration for propagation
• Flush local DNS cache
• Keep old mail servers active during transition
• Monitor propagation with multiple tools

Problem: Wrong Mail Server Priority

Symptoms:

• Backup server receiving primary traffic
• Load not distributed as intended
• Unexpected mail routing behavior

Diagnosis:

• Review priority numbersbettermerge+1​
• Verify lower number = higher prioritybettermerge​
• Check all MX record priority values

Solutions:

• Correct priority numbering (lower = higher)bettermerge​
• Adjust priority for proper hierarchyabnormal​
• Test email delivery after changes
• Document intended mail flow

Best Practices for MX Records

For All Domains

✅ Always configure at least 2 MX recordsabnormal​
✅ Use different priority values (10, 20, 30, etc.)bettermerge+1​
✅ Point to A records, never CNAMEcopernica​
✅ Use fully qualified hostnames with trailing dot
✅ Set appropriate TTL (3600 seconds standard, lower before changes)bettermerge​
✅ Test regularly with MX lookup toolsdnschecker​
✅ Monitor IP reputation of mail serversdnschecker​

For Production Environments

✅ Geographic distribution – Backup servers in different locationsabnormal​
✅ Provider diversity – Don't rely on single provider
✅ Load balancing – Multiple equal-priority servers for high volumeabnormal​
✅ Redundancy planning – Test backup servers regularlyabnormal​
✅ Security hardening – Implement SPF, DKIM, DMARC
✅ Monitoring alerts – Automated checks for configuration changes
✅ Documentation – Maintain runbooks for email infrastructure

For Email Migrations

✅ Plan thoroughly – Document current and target configuration
✅ Lower TTL 24-48 hours before migrationbettermerge​
✅ Test new servers before DNS changes
✅ Staged rollout – Update MX records during low-traffic period
✅ Keep old servers active for TTL duration
✅ Monitor both old and new servers during transition
✅ Verify propagation with MX lookup from multiple locationsdnschecker​
✅ Update related records (SPF, DKIM, DMARC) simultaneously

For Security

✅ Enable SPF – Specify authorized sending servers
✅ Configure DKIM – Add cryptographic signatures
✅ Implement DMARC – Define email authentication policy
✅ Monitor blacklists – Regular IP reputation checksdnschecker​
✅ Use TLS/SSL – Encrypt email transmission
✅ Restrict access – Limit who can modify DNS records
✅ Audit regularly – Review MX configuration quarterly

Frequently Asked Questions

What happens if a domain has no MX records?

Without MX records, your domain cannot receive email. Sending mail servers will:easydmarc​

1. Look for MX records and find noneeasydmarc​
2. Fall back to A record (if exists)abnormal​
3. Most modern servers reject this configuration due to spam concernsabnormal​
4. Emails bounce back to senders

Solution: Add proper MX records to receive email.easydmarc​

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

Typical propagation time: 24-48 hours based on TTL values:bettermerge​

• TTL 300 seconds (5 minutes): Changes visible in 5-30 minutes
• TTL 3600 seconds (1 hour): Changes within 1-4 hoursbettermerge​
• TTL 86400 seconds (24 hours): Up to 48 hours for full propagationbettermerge​

Speed it up: Lower TTL to 300 seconds 24-48 hours before making changes.bettermerge​

Can I have multiple MX records?

Yes, and you should. Multiple MX records provide:abnormal​

• ✅ Redundancy: Backup if primary server failsabnormal​
• ✅ Load balancing: Distribute email across serversabnormal​
• ✅ High availability: Minimize downtime risk
• ✅ Better deliverability: Improved reliability

Best practice: Minimum 2 MX records for production domains.abnormal​

What does MX priority mean?

Priority determines which mail server is tried first:bettermerge+1​

• Lower number = HIGHER prioritybettermerge+1​
• Priority 10 is tried before priority 20bettermerge​
• Equal priority = random selection (load balancing)abnormal​
• Backup servers have higher numbers (20, 30, etc.)abnormal​

Common mistake: Thinking higher number means higher priority—it's the opposite.bettermerge​

Do MX records affect outbound email?

No, MX records only control INBOUND email:easydmarc+1​

• MX records: Where to deliver email TO your domaineasydmarc​
• Outbound email: Controlled by SMTP server settings, SPF, DKIM
• Not related: Different systems entirely

For outbound: Configure SPF records and SMTP authentication.

Can MX records point to IP addresses?

No, MX records must point to hostnames, not IP addresses:copernica​

• ❌ Invalid: example.com. MX 10 192.168.1.1
• ✅ Valid: example.com. MX 10 mail.example.com.copernica​

Why: MX records require hostnames that resolve via A/AAAA records.copernica​

What's the difference between MX and mail server?

MX record = DNS entry pointing to mail server locationeasydmarc​
Mail server = Actual server software (Postfix, Exchange, etc.)

Analogy: MX record is like a street address; mail server is the building at that address.

How do I check if my MX records are correct?

Use our MX Lookup Tool:dnschecker​

1. Enter your domain namezoho​
2. Click "Check MX Records"bettermerge​
3. Verify results match your email provider's documentation
4. Confirm multiple mail servers existabnormal​
5. Check IP addresses aren't blacklisteddnschecker​
6. Test by sending an email to yourself

Related CyberTools for Email Management

Complement your MX lookups with these related tools on CyberTools:

📧 SPF Record Checker

• Verify Sender Policy Framework configuration
• Validate authorized sending servers
• Improve email deliverability

🔐 DKIM Record Validator

• Check DomainKeys Identified Mail setup
• Verify email authentication
• Test cryptographic signatures

🛡️ DMARC Record Lookup

• Analyze email authentication policy
• Check DMARC configuration
• Monitor email security posture

🌐 DNS Lookup Tool

• Check all DNS record typeszoho​
• View A, AAAA, CNAME, TXT, NS records
• Complete DNS configuration audit

🔍 Email Header Analyzer

• Trace email delivery path
• Identify spam patterns
• Troubleshoot delivery issues

📊 IP Blacklist Checker

• Verify mail server reputationdnschecker​
• Check 50+ spam databasesdnschecker​
• Monitor IP blacklist status

🔄 NS Lookup

• Check nameserver configuration
• Verify authoritative DNS serversmxtoolbox​
• Troubleshoot DNS delegation

📋 Email Validation Tool

• Verify email address validity
• Check MX records for domains
• Validate email deliverability

Command-Line MX Lookup (For Advanced Users)

Windows (nslookup)nslookup​

text
nslookup -q=mx example.com

Linux/macOS (dig)nslookup​

bash
dig example.com mx

Linux/macOS (host)nslookup​

bash
host -t mx example.com

Our web tool is easier: No command-line knowledge needed.dnschecker+1​

Start Checking MX Records Now

Stop guessing about email configuration. Get instant, accurate MX record information with the CyberTools MX Lookup Tool.

✅ Completely free unlimited lookupsdnschecker​
✅ Instant results from authoritative DNSmxtoolbox​
✅ Priority and IP address detailsdnschecker+1​
✅ No registration requireddnschecker​
✅ IP blacklist checking includeddnschecker​
✅ Multiple DNS server testingdnschecker​
✅ Provider identification automatic

Check MX Records Now →

Need bulk MX lookups? Contact us about API access for enterprise email infrastructure monitoring, automated testing, and large-scale domain verification.

Have questions? Reach out at support@cybertools.cfd or visit our Contact Page.

The CyberTools MX Lookup Tool helps thousands of email administrators, system administrators, and IT professionals verify mail server configuration every day. Join them in ensuring reliable, properly configured email delivery.

Related Resources:

• SPF Record Checker
• DKIM Validator
• DMARC Lookup
• DNS Lookup
• Email Tools Collection
• Email Deliverability Guide
• Help Center

1. https://mxtoolbox.com
2. https://dnschecker.org/mx-lookup.php
3. https://easydmarc.com/tools/mx-lookup
4. https://www.copernica.com/en/news/post/a-record-and-mx-record-how-does-it-work
5. https://bettermerge.com/tools/mx-lookup/
6. https://www.zoho.com/toolkit/mx-lookup.html
7. https://abnormal.ai/glossary/mx-record
8. https://www.nslookup.io/mx-lookup/
9. https://powerdmarc.com/dns-mx-record-lookup/
10. https://www.uriports.com/tools/mx-validator