domain report
Is du.se a business email?
du.se 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
- —
- SPF
- v=spf1 mx ip4:130.243.57.174 ip6:2001:6b0:12:8010::b0 ip4:130.243.58.134 ip6:2001:6b0:12:8020::13 ip4:130.243.58.96 ip6:2001:6b0:12:8020::11 ip4:35.156.249.23 ip4:35.157.192.32 ip4:35.157.47.202 ip4:35.157.87.137 ip4:130.243.58.175 ip4:82.196.180.210 ip6:2001:6b0:12:8020::14 include:spf.protection.outlook.com include:all._spf.plma.se include:spf.mandrillapp.com include:mail.koha-ptfs.co.uk -all
- DMARC policy
- reject
| Priority | MX host |
|---|---|
| 10 | mailfilter-ng-1.sunet.se |
| 10 | mailfilter-ng-3.sunet.se |
| 10 | mailfilter-ng-4.sunet.se |
Workspace
- Google WorkspaceNot detected
- Microsoft 365Detected · region EU · 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 du.se 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. du.se receives mail through mailfilter-ng-1.sunet.se, mailfilter-ng-3.sunet.se, mailfilter-ng-4.sunet.se.
Questions about du.se
Is du.se a business email?
It is an organizational email on an education domain. isBusinessEmail returns category "education" with is_business: true.
Can I use du.se 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 du.se sign-ups?
isBusinessEmail recommends allow for education domains under the b2b, strict and lenient policies.