domain report
Is a2.keio.jp a business email?
a2.keio.jp is an education domain: a school, college or university.
Education domain — a school or university.
- category
- education
- recommendation
- allow
- confidence
- 93%
- Google Workspace: not detected
- Microsoft tenant: detected
Mail setup
- Receives mail
- No
- Mail provider
- —
- SPF
- v=spf1 -all
- DMARC policy
- reject
| Priority | MX host |
|---|---|
| 0 |
Workspace
- Google WorkspaceNot detected
- Microsoft 365Tenant only: Microsoft sign-in works, email runs elsewhere · region NA · managed sign-in
Detected per company domain from public DNS and Microsoft's documented tenant discovery — never per person.
Why this verdict
Confidence 93% · recommendation allow under the default b2b policy.
What this means
Addresses at a2.keio.jp belong to an institution's own domain, so isBusinessEmail treats them as organizational: is_business is true and the recommendation is allow under every policy. It is on our education domains list.
Students and staff use these addresses, which makes them useful for academic discounts and verification. a2.keio.jp publishes no MX records, so it can't receive email at the moment.
Questions about a2.keio.jp
Is a2.keio.jp a business email?
It is an organizational email on an education domain. isBusinessEmail returns category "education" with is_business: true.
Can I use a2.keio.jp to verify students?
An address on an education domain shows the person has an account at the institution, which many companies accept for student discounts. Alumni and staff may have one too.
Should I allow a2.keio.jp sign-ups?
isBusinessEmail recommends allow for education domains under the b2b, strict and lenient policies.