MX Record Lookup
Check any domain's mail server configuration instantly. View MX records with priority, and verify SPF and DMARC are in place.
What are MX records?
MX (Mail Exchange) records tell the internet which servers handle email for your domain. Each MX record has a priority number — lower numbers are tried first. When someone sends email to you@yourdomain.com, their mail server looks up your MX records to know where to deliver the message.
Why check your MX records?
Missing or misconfigured MX records mean lost email. If you recently switched email providers (e.g., to Google Workspace or Microsoft 365), outdated MX records will route mail to your old provider. SPF and DMARC records work alongside MX to prevent email spoofing and improve deliverability.
How to fix MX issues
Update MX records in your DNS provider to point to your email service. For Google Workspace, use ASPMX.L.GOOGLE.COM and its alternates. For Microsoft 365, use your tenant-specific records. Always set correct priorities and remove old MX entries. Add SPF and DMARC records to protect against spoofing.
FAQ
Frequently asked questions
Is this MX lookup tool free?+
Yes, completely free. No signup or credit card required. Check any public domain's MX records and email configuration instantly.
What does MX priority mean?+
Priority determines the order mail servers are tried. A server with priority 10 is tried before one with priority 20. If the first server is unavailable, the sender falls back to the next priority. Lower numbers mean higher preference.
How is this different from a full DNS lookup?+
This tool focuses specifically on email infrastructure: MX records plus SPF and DMARC validation. Our DNS Lookup tool shows all record types. CQwerty Shield's full scan covers both, plus 16 other security dimensions.
MX Record Lookup is just the start.
CQwerty Shield checks SSL, DMARC, SPF, DNS, HTTP headers, WHOIS, breach intel, and more — with CVE/KEV cross-references on every finding.
Free full scan — no signup →