Email Provider Setup Checker
Compare a domain against common Google Workspace or Microsoft 365 record patterns, then detect layered email security services such as Mimecast, Hornetsecurity, Proofpoint, Barracuda, and Sophos.
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How to Tell Which Email Provider a Domain Uses
Learn how to tell whether a domain uses Google Workspace, Microsoft 365, or another mail provider by reading MX, SPF, DKIM, and related DNS patterns.
DNS Records Required for Google Workspace (Complete Setup Guide)
Complete guide to Google Workspace DNS records including MX, SPF, DKIM, DMARC, and domain verification. Includes real record examples and setup best practices.
DNS Records Required for Microsoft 365 (Complete Setup Guide)
Complete guide to Microsoft 365 DNS records including MX, SPF, CNAME, DKIM, and DMARC. Includes real record examples and migration best practices.
