domain report
Is shizuoka.ac.jp a business email?
shizuoka.ac.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 365: detected
Mail setup
- Receives mail
- Yes
- Mail provider
- barracuda
- SPF
- v=spf1 +ip4:133.70.128.240 +ip4:133.70.128.254 +ip4:133.70.129.2 +ip4:133.70.129.3 +ip4:133.70.129.4 +ip4:133.70.8.11 +ip4:133.70.8.212 +ip4:133.70.80.16 +ip4:133.70.80.48 +ip4:153.127.193.23 +ip4:49.212.149.247 include:spf.protection.outlook.com +ip4:133.70.128.213 +ip4:133.70.128.214 +ip4:133.70.128.230 ~all
- DMARC policy
- None
| Priority | MX host |
|---|---|
| 6 | d276586a.ess.barracudanetworks.com |
| 6 | d276586b.ess.barracudanetworks.com |
Workspace
- Google WorkspaceNot detected
- Microsoft 365Detected · region AS · 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 shizuoka.ac.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. shizuoka.ac.jp receives mail through d276586a.ess.barracudanetworks.com, d276586b.ess.barracudanetworks.com.
Questions about shizuoka.ac.jp
Is shizuoka.ac.jp a business email?
It is an organizational email on an education domain. isBusinessEmail returns category "education" with is_business: true.
Can I use shizuoka.ac.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 shizuoka.ac.jp sign-ups?
isBusinessEmail recommends allow for education domains under the b2b, strict and lenient policies.