MX Record Lookup
Find out what email service any domain uses. We check MX, SPF, and DMARC records in one lookup.
Looking up DNS records...
Detected Email Provider
Unknown
MX Records
| Priority | Mail Server |
|---|
No MX records found. This domain may not have email configured.
SPF Record
DMARC Record
How MX Lookups Work
Every domain that receives email has MX (Mail Exchanger) records in its DNS configuration. These records tell sending mail servers where to deliver email addressed to that domain.
By examining the hostnames in MX records, we can identify which email service provider a domain uses. For example, MX records pointing to Google's servers (aspmx.l.google.com) indicate Google Workspace, while records pointing to Microsoft's servers indicate Microsoft 365.
This tool also checks SPF and DMARC records, giving you a complete picture of a domain's email infrastructure and security posture.
Frequently Asked Questions
What are MX records?
MX (Mail Exchanger) records are DNS records that specify which mail servers are responsible for receiving email for a domain. When someone sends an email to user@example.com, the sending server looks up the MX records for example.com to find where to deliver the message.
How can I tell what email service a company uses?
Look up their MX records. The mail server hostnames typically reveal the provider — for example, if MX records point to aspmx.l.google.com, the domain uses Google Workspace. If they point to mail.protection.outlook.com, they use Microsoft 365.
Why would I want to look up someone's MX records?
Common reasons include: verifying email deliverability configurations, identifying what ESP a competitor uses, troubleshooting email delivery issues, checking if a domain has email properly configured, and competitive research to understand what tools others in your industry are using.
Can I see who sends email for any domain?
MX records show who receives email for a domain, not who sends it. To see authorized senders, check the SPF record instead. This tool checks both MX and SPF records when available.
What do MX record priorities mean?
Lower priority numbers indicate higher preference. A mail server with priority 10 will be tried before one with priority 20. Multiple MX records provide redundancy — if the primary server is unavailable, email is delivered to the next server in priority order.