“Outlook” is a family, not a product. The consumer Outlook.com (the successor to Hotmail), the legacy Live.com and Hotmail.com mailboxes still in use, and the enterprise Microsoft 365 tenant-filtered system all behave differently. We cover all four distinctly.
Why separation matters
- Hotmail and Live mailboxes still exist and often behave more conservatively on content than Outlook.com.
- Outlook.com consumer is SmartScreen-driven; enterprise M365 is SmartScreen + tenant filter rules.
- M365 tenants can override Microsoft's default classification — a draft that lands Inbox on consumer Outlook can land Junk on a customer's M365 tenant.
- Focused vs Other is an M365 consumer/Outlook.com tab split, further differentiating placement.
What we test separately
- Outlook.com (current consumer).
- Hotmail.com.
- Live.com.
- Office 365 / Microsoft 365 tenants (multiple tenants with different default security baselines).
What the report shows
- Folder per seed: Focused / Other / Junk / Blocked.
- Auth verdict as interpreted by SmartScreen.
- For M365: tenant-level differences flagged when the same message lands differently on different tenants.
- Blocked at delivery vs filtered post-delivery distinction.
Microsoft-specific gotchas
- SmartScreen weights URL reputation heavily — a single flagged link destroys placement.
- Missing PTR or mismatched rDNS is harsher on Microsoft than on Gmail.
- Microsoft's SNDS portal is the Postmaster equivalent; we link to it and remind you to enrol.
- Microsoft is slowly tightening bulk-sender rules in line with Gmail/Yahoo 2024. Stay ahead.
Test Microsoft properly
Run a free test. All four Microsoft mail systems selectable separately. No signup.
FAQ
Do Hotmail and Live still matter?
Yes — they're smaller but still receive real cold outbound. Users who never migrated remain on legacy domains.
Is M365 tenant coverage deterministic?
Yes — we use multiple tenants with different security baselines. If the results diverge, you see it.
Does ATP change the picture?
Advanced Threat Protection is a super-set. On tenants running ATP, SmartScreen + ATP's URL rewriting will modify results. We surface that in the tenant detail.
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