Email Provider Detection
Free Email Provider Detector
Paste an email address or domain to identify its mail hosting provider — from real MX, SPF, DKIM, reverse DNS and SMTP banner signals, with a confidence score and the matched evidence.
Email Provider Detection
Identifies the mail hosting provider from MX, SPF, DKIM, reverse DNS, ASN and SMTP banner signals.
Enter a domain above to run a real, live check.
Capabilities
What it checks
20 providers recognized
Google Workspace, Microsoft 365, Zoho, SendGrid, Mailgun, Proton and more.
Scored confidence
Multiple independent signals combine into an honest confidence score, not a guess.
Full evidence shown
Every matched signal is listed — nothing is asserted without a reason.
Why use it
Benefits
- Quickly identify a prospect or contact's mail platform before an outreach campaign.
- Confirm a mail migration actually completed for a domain you manage.
- Export the detection as JSON for documentation.
FAQ
Frequently Asked Questions
From real signals — MX hostname patterns, SPF includes, DKIM CNAME targets, the mail server's reverse DNS and network operator, and its SMTP banner — each weighted into a confidence score with the matching evidence shown.