Free Online MX Lookup
Use MX Lookup to check DNS records for any domain's Mail Exchange servers, which are listed here by priority order. This workspace brings five essential tools together: an MX record lookup with automatic provider identification, an email health checker for MX, SPF, and DMARC scoring, a visual SPF parser, a DMARC policy analyzer, and a bulk lookup tool for processing large domain lists. Just enter a domain or upload a file to get started. You'll get results in seconds thanks to our fast DNS query engine.
MX Lookup
Queries MX records for any domain, showing priority, exchange server, TTL, and detected email provider.
Email Health Check
Audits MX, SPF, and DMARC in parallel with a score out of 100 and actionable recommendations.
SPF Lookup
Retrieves and parses SPF records with color-coded mechanism badges and qualifier labels.
DMARC Lookup
Queries _dmarc subdomain and parses policy, subdomain policy, percentage, and reporting addresses.
Bulk Lookup
Processes domain lists from text or uploaded files with live progress and CSV export.
Online MX Lookup for Email Server Discovery and Provider Identification
Identifying the mail servers that handle a domain's email is vital when you need to troubleshoot delivery issues, verify DNS changes, or audit competitors. When you enter a domain, the tool queries Cloudflare DNS and returns every MX record sorted by its priority level. The lowest number marks the primary mail server, while higher numbers act as fallbacks. Each result includes the exchange hostname, TTL value, and an automatic provider label if the hostname matches a known service like Google Workspace, Microsoft 365, or Zoho.
Automatic Mail Provider Detection
Our built-in database automatically recognizes over 25 major email providers by scanning the MX exchange hostnames. You can spot Google Workspace or Microsoft 365 at a glance instead of manually checking hostnames yourself. This comes in handy when you're auditing client domains or reviewing a vendor's email infrastructure.
Search History for Quick Revisits
You can find all your recent lookups saved in the history panel on the left for easy access. Clicking any previous entry restores the results instantly without needing to re-query DNS. This makes it much easier to compare different MX configurations during your session.
Check SPF, DMARC, and Email Authentication Health
Setting up your email authentication correctly is the best way to prevent spoofing, phishing, and frustrating delivery failures. The Email Health Checker scans your MX, SPF, and DMARC records at the same time to give you a score out of 100, highlighting exactly where you pass or need improvement. You'll see higher scores for domains that use multiple MX servers, strict SPF policies, and DMARC settings like quarantine or reject. If there are gaps, the tool provides specific recommendations on which TXT records to update.
SPF Mechanism Parsing with Visual Breakdown
SPF Lookup does much more than just show you the raw record string. It assigns a color-coded badge to every mechanism, such as include, a, mx, or ip4, along with its qualifier label. This visual breakdown helps you quickly verify that your authorized senders are listed correctly and that your default policy for unlisted senders is strict enough.
DMARC Policy Analysis and Reporting Addresses
DMARC Lookup checks the _dmarc subdomain and breaks down every tag in the record so they're easy to understand. You can quickly see the enforcement policy, subdomain settings, and the reporting addresses where aggregate and forensic reports are sent. A built-in guide panel explains each policy level so you can make informed decisions about tightening your email security.
Free MX Lookup for IT Administrators and Email Professionals
If you're migrating email services, troubleshooting bounces, or auditing your organization's security, you can find all the lookups you need in this single workspace. Bulk Lookup handles entire domain lists with a live progress bar and lets you export results to CSV. You can use every tool here without signing up, hitting rate limits, or worrying about your queries being stored on a server. DNS responses route through a minimal API proxy and reach your browser directly and securely.
Bulk Domain Processing with File Upload
Just paste your domain list or upload a text file to check MX records for every entry in sequence. The live progress bar shows exactly how many domains have been processed so far. Each result row displays the domain status, primary MX server, and detected provider, and you can download everything as a CSV file for your reports.
No Signup, No Limits, Lightweight DNS Proxy
You can access every subtool immediately without having to create an account. All DNS queries use a lightweight server-side proxy to Cloudflare DNS-over-HTTPS to ensure fast and reliable responses. Your domain queries are never logged, stored, or tracked beyond your current session.
Related DNS and Network Tools
If you work with DNS and email infrastructure regularly, these tools complement what you can do here:
- Email Health Checker: Audit MX, SPF, and DMARC configuration with a score out of 100
- SPF Record Lookup: Parse SPF mechanisms with color-coded badges
- DMARC Record Lookup: Analyze DMARC policy and reporting settings
- Bulk MX Lookup: Process domain lists with file upload and CSV export
- DNS Lookup: Query A, AAAA, CNAME, NS, TXT, and other DNS record types
- What Is My IP: Check your public IP address and connection details
- CIDR Calculator: Calculate subnet ranges and IP allocation
- MAC Address Generator: Generate, convert, and validate MAC addresses