Free MX Record Checker
Run an MX lookup on any domain. See mail servers and their priorities — then monitor for changes that could break email delivery.
What is an MX record? Learn here.
What is an MX lookup?
MX (Mail Exchange) records tell the internet where to deliver email for your domain. When someone sends an email to your address, their mail server looks up your domain's MX records to find which servers accept mail — and in what order of priority.
An MX record lookup queries DNS for these records and returns the list of mail servers and their priority values. If your MX records are missing, misconfigured, or pointing to the wrong servers, incoming email will bounce or disappear silently.
Our free MX record checker runs this lookup instantly. Enter any domain to see its mail server configuration, verify that hostnames resolve correctly, and check that priorities are set up for proper failover.
Everything you need to monitor email deliverability
Monitor SPF records for changes and DNS lookup limit issues.
Monitor DKIM keys for changes and validity.
Monitor DMARC policy for changes affecting failed email handling.
Monitor MX records for changes that could break inbound email.
Monitor BIMI record and logo URL for brand display issues.
Check major blacklists daily for your domain and sending IPs.
Free Checker. Free Monitoring. Paid Unlimited.
Check any domain instantly. Monitor up to 3 domains free. Go unlimited with Pro.
MX Record Checker
- Record changes
- Server hostname validity
- Priority configuration
- Missing records
Email Deliverability
- Up to 3 domains
- Daily checks
- SPF, DKIM, DMARC, BIMI, MX monitoring
- Blacklist monitoring
- Email alerts
Email Deliverability Pro
- Unlimited domains
- Up to 5 co-recipients
- Custom check timing
- On-demand manual checks
- Bulk CSV import
Start monitoring your email deliverability
Get alerted before authentication issues affect your emails.