domain report

Is github.com a business email?

Yes. Work email on a company-owned domain.

GET /v1/check?domain=github.comchecked 26 Oct 2026
isBusinessEmail("github.com")
true

Work email on a company-owned domain. The company runs Google Workspace and Microsoft 365.

category
business
recommendation
allow
confidence
99%
  • Google Workspace: detected
  • Microsoft 365: detected

Mail setup

Receives mail
Yes
Mail provider
microsoft 365
SPF
v=spf1 ip4:192.30.252.0/22 include:spf.protection.outlook.com include:_netblocks.google.com include:_netblocks2.google.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com include:sendgrid.net ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ~all
DMARC policy
quarantine
MX records for github.com
PriorityMX host
0github-com.mail.protection.outlook.com

Workspace

  • Google WorkspaceDetected
  • Microsoft 365Detected · region WW · managed sign-in

Detected per company domain from public DNS and Microsoft's documented tenant discovery — never per person.

Why this verdict

Confidence 99% · recommendation allow under the default b2b policy.

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