In forceInboxIn force 6 Jul 2026

Microsoft SNDS and JMRP expose per-IP and junk-report data

What do Microsoft SNDS and JMRP actually provide for email senders?

Global · Microsoft

In one sentence

Microsoft SNDS/JMRP show Outlook IP health and junk reports — they diagnose; they do not auto-fix delivery.

Plain English

Smart Network Data Services (SNDS) and Junk Mail Reporting Program (JMRP) let you see how Outlook views your IPs and when users junk you. Dedicated-IP senders should enroll. Shared-IP senders usually need the to own or share that data. Reading the charts without fixing auth, complaints, or list quality changes nothing.

Why it matters. Outlook is huge B2B and consumer. Flying blind without SNDS is optional ignorance for programs.

Dotted words open definitions. Full glossary.

What to do

Your move — not a lecture

Part platform, part you

The platform covers the mechanical bit. The judgement is still yours.

Some enroll shared infrastructure and suppress on junk signals. Confirm in writing for your account.

Your part: IP ownership map, requesting access for dedicated IPs, and acting on junk spikes.

What to do first

Build a one-row-per-sending-IP sheet: owner, shared/dedicated, SNDS access, JMRP destination, suppression owner. Empty access on dedicated IPs is the gap.

You can skip this if: You send no mail to Outlook.com consumer domains.

Who this applies to

Anyone sending material volume to Outlook.com, Hotmail or Live, especially on dedicated IPs.

Checklist

01Do not treat SNDS enrollment as a bulk-sender compliance checkbox like .
02Verify current portal terms rather than quoting old "free" support articles.
03Wire junk reports into suppression with the same seriousness as unsubscribes.
04Combine with Microsoft's authentication requirements.

That’s enough to act. Sources and exact wording are below for counsel, bosses, or AI tools that need a citation. Not legal advice.

Proof

Exact position, enforcement, sources

For records and people who will check you. Skip if Monday’s move is already clear.

The exact position

Microsoft's Smart Network Data Services (SNDS) and Junk Email Reporting Program (JMRP) give visibility into Outlook.com reputation and user junk reports for enrolled sending IPs. Enrollment is a monitoring action, not a substitute for authentication requirements. Deliverability is still reputation-based. Whether JMRP is free, and what each auto-does with reports, must be verified in the current portal and ESP docs—do not copy outdated "always free" folklore.

What happens if you do not

No fine for skipping SNDS. The cost is flying blind on Outlook reputation while competitors read the dashboard.

Source

Microsoft, Outlook.com Smart Network Data Services
Published 6 Jul 2026Read primary source

History of this page

2 Aug 2026Added as monitoring guidance, not a sending mandate.

Awkward questions

Who is this actually for?

People who ship email and are too busy to re-read every PDF: week-one marketers, lifecycle/CRM, deliverability, multi-country ops, DTC brands, agencies — on Klaviyo, Mailchimp, Braze, HubSpot, SFMC, or something else. Pick your tool and geos so product-specific pages only appear when they match. EU and UK are first-class filters. Not for people who sell tools about email and need a fake score to demo.

Why only ~40 rules? Isn’t that… thin?

On purpose. A wall of 400 undated “best practices” is how you look busy and still get burned. Every page needs a primary source we actually read. Thin and checkable beats fat and folklore. Europe, bulk inbox rules, measurement honesty, and protocol topics like BIMI/DMARC policy are on the shelf when we can cite them — not every Member State and not every vendor myth. Coverage map lists what we still refuse to invent.

Is this legal advice?

No. If it were, you’d have a billable hour and a longer PDF. This is a dated operator reference written by an email geek. Confirm anything high-stakes with counsel who knows your facts. Same for “will this make me compliant?” — no tool does that. Lawyers and judges do. We say what the sources say and what to do first on Monday.

Why no trust score out of 100?

Because we refuse to invent a number you can’t audit. Fake scores sell seed tests and panic. You get findings, dates, and links. If that feels less exciting than a red dial, good — you’re not the red-dial customer.

Why should I trust you more than my ESP’s blog?

ESPs sell seats. Seed-score vendors sell fear. AI invents citations when nobody watches. We sell nothing today — no pixels, no placement scores, no affiliate — so we can say when a tool is the problem. A human verifies, dates, and corrects in public. Tools may help draft; they do not ship unsourced claims. Check the primary links. Fail that test and leave.

Do I need an account?

No. Filters live in this browser and the URL. Share the link. That’s it. Accounts come later only if they earn it — not so we can nurture you about email.

I’m an agency. Where’s multi-client mode?

We tried a client-name CRM on the setup card. It made the product feel like work before it felt useful. Role filters + copy link + one-page brief (optional PDF title) is enough for now. Complexity comes back when the free shelf is habit, not before.

Is the quiet changelog a bug?

No. Quiet means nothing material moved. We don’t invent urgency so the homepage looks “alive.” Sticky risks still show what usually needs a person when the market is still.