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.
Results
What this tool checks
Email Provider Setup Checker compares a domain against common Google Workspace and Microsoft 365 DNS patterns, then highlights email security gateways layered in front of those providers. It is designed to answer both which provider a domain appears to use and whether the DNS setup broadly matches that provider.
When to use it
- Check whether a domain looks like Google Workspace or Microsoft 365 before a migration.
- Validate provider-related MX and TXT setup after making mail DNS changes.
- Spot extra security gateways that may affect routing, filtering, or authentication.
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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.
How to Check Email Provider Setup for a Domain
A practical workflow for checking whether a domain's email provider setup looks like Google Workspace, Microsoft 365, or a mixed environment with extra gateways.
How to Check Google Workspace DNS
A practical guide to checking Google Workspace DNS records, including MX, SPF, DKIM, DMARC, and the signs of a mixed or incomplete setup.