domain report
Is yosfer.com a business email?
No. yosfer.com is a free email provider: one shared domain used by many unrelated people.
Personal email on a shared provider (think Gmail, Outlook, Yahoo).
- category
- personal
- recommendation
- block
- confidence
- 97%
- Google Workspace: not detected
- Microsoft 365: not detected
Mail setup
- Receives mail
- Yes
- Mail provider
- —
- SPF
- v=spf1 include:spf.163.com -all
- DMARC policy
- quarantine
| Priority | MX host |
|---|---|
| 5 | hzmx01.mxmail.netease.com |
| 10 | hzmx02.mxmail.netease.com |
Workspace
- Google WorkspaceNot detected
- Microsoft 365Not detected
Detected per company domain from public DNS and Microsoft's documented tenant discovery — never per person.
Why this verdict
Confidence 97% · recommendation block under the default b2b policy.
What this means
Anyone can open an inbox at yosfer.com, so an address there says nothing about the company the person works for. That makes it a personal email, even when someone uses it for work. It is on our free email providers list.
isBusinessEmail returns category "personal": block under the b2b and strict policies, allow under lenient. yosfer.com receives mail through hzmx01.mxmail.netease.com, hzmx02.mxmail.netease.com.
Questions about yosfer.com
Is yosfer.com a business email?
No. yosfer.com is a shared email provider, so isBusinessEmail classifies it as "personal". A business email uses a domain the company owns.
Is yosfer.com a free email provider?
Yes. yosfer.com hands out inboxes on its own domain to individuals, which is what makes an address there a personal email.
Should a B2B product accept yosfer.com sign-ups?
It depends on what you need. If you need a company tenant or a company to sell to, ask for a work email; if you only want real people, accept it. The b2b policy blocks personal addresses and the lenient policy allows them.
How can I tell yosfer.com apart from a company domain in code?
POST the address to /v1/check: shared providers come back with category "personal" and is_free_provider: true, company domains with category "business".