Microsoft SNDS: Setup and Reading Your Data

What SNDS Shows You

Microsoft SNDS (Smart Network Data Services) provides visibility into how your sending IPs perform across Microsoft's consumer email services:

• Outlook.com
• Hotmail.com
• Live.com
• MSN.com

This is separate from Microsoft 365 enterprise filtering, though insights often correlate.

Setting Up SNDS

Step 1: Create a Microsoft account

Go to sendersupport.olc.protection.outlook.com and sign in. Any Microsoft account works—it doesn't need to be associated with your sending domain.

Step 2: Request access

Click "Request Access" and add your sending IP addresses. You can add:

• Individual IPs: 192.0.2.1
• IP ranges: 192.0.2.0/24
• Multiple entries

Step 3: Verify ownership

Microsoft verifies IP ownership through:

• Automated email to abuse@ or postmaster@ addresses
• WHOIS registration data
• Manual verification for edge cases

Verification typically completes within 24-48 hours.

Step 4: Access data

Once verified, log in to see your IP data. Data appears within 24-48 hours of sending to Microsoft recipients.

Practitioner note: SNDS registration often fails because abuse@ or postmaster@ emails aren't configured or go to the wrong place. Before registering, verify these addresses receive mail and someone monitors them.

Understanding SNDS Data

IP Status Colors

Color	Status	Action
Green	Good	Normal delivery expected
Yellow	Warning	Issues detected, investigate
Red	Poor	Significant filtering/blocking
Gray	Insufficient data	Need more volume

Data Fields

Activity Period: Date range for the data shown (typically rolling 7-30 days)

Message Volume: Approximate emails sent to Microsoft recipients

Complaint Rate: Percentage of recipients who clicked spam

Trap Hits: Emails sent to known spam trap addresses

Filter Results: How Microsoft filtered your mail:

• Good: Delivered to inbox
• Suspicious: Some filtering applied
• Blocked: Rejected outright

Setting Up JMRP

JMRP (Junk Mail Reporting Program) sends complaint notifications in real-time.

Setup:

1. Go to postmaster.live.com/snds/JMRP.aspx
2. Provide an email address for ARF reports
3. Complete IP authorization
4. Reports start arriving within 24 hours

What JMRP provides:

• Complainer email address
• Your sending IP
• Timestamp
• Original message headers

Critical: Use JMRP data to automatically suppress complainers. This data is gold—Gmail doesn't provide anything comparable.

Practitioner note: I've seen clients ignore JMRP reports for months, then wonder why Microsoft deliverability tanked. Process these reports automatically. Every JMRP notification should trigger immediate suppression of that address.

Interpreting Your Data

Healthy Patterns

• All IPs showing green status
• Complaint rate below 0.1%
• Zero or minimal trap hits
• Consistent volume day-to-day

Warning Signs

• Any IP showing yellow
• Complaint rate above 0.2%
• Trap hits appearing
• Significant volume from unknown IPs

Problems Requiring Action

• Red status on any IP
• Complaint rate above 0.3%
• Regular trap hits
• "Blocked" filter results

Common SNDS Issues

"No data available"

Causes:

• Insufficient volume to Microsoft recipients
• IP verification not complete
• Very new IP with no history

Solution:

• Confirm verification completed
• Continue sending—data appears with volume
• Check you're looking at the correct IPs

Yellow status despite good practices

Causes:

• Historical reputation damage
• Shared infrastructure issues (if applicable)
• Spam traps in your list

Solution:

• Review list hygiene
• Check for recent changes
• Clean list more aggressively
• Monitor for improvement

Red status

Causes:

• High complaint rates
• Spam trap hits
• Blocklist presence
• Authentication failures

Solution:

1. Stop sending to unengaged recipients
2. Check blocklists (Spamhaus, etc.)
3. Verify authentication
4. Request delist if applicable
5. Rebuild reputation gradually

SNDS vs Google Postmaster

Aspect	SNDS	Google Postmaster
Focus	IP reputation	Domain reputation
Complaint data	Individual via JMRP	Aggregate only
Trap data	Visible	Not shown
Volume threshold	Moderate	Higher
Data lag	24-48 hours	24-48 hours

For complete visibility, use both. Gmail focuses on domain reputation signals; Microsoft focuses on IP reputation signals. Different troubleshooting approaches for each.

Using SNDS for Troubleshooting

Microsoft delivery suddenly dropped

1. Check SNDS for status changes
2. Look for complaint rate spikes
3. Check for new trap hits
4. Review recent sending changes

Specific campaign performed poorly

1. Note the dates
2. Check SNDS data for those days
3. Compare complaint rates to baseline
4. Identify what differed in that campaign

IP status degraded over time

1. Review historical data (if saved)
2. Check for gradual complaint rate increase
3. Look for list quality degradation
4. Implement stricter list hygiene

Practitioner note: Microsoft's IP focus means shared IP problems hurt more than with Gmail. If you're on a shared IP that went red, you may not have caused it—but you're affected. Use SNDS data to have evidence when discussing with your ESP.

Best Practices

Regular monitoring:

• Check SNDS weekly (daily during campaigns)
• Track status changes over time
• Screenshot data for records

Process JMRP:

• Automate complaint suppression
• Never email complainers again
• Track complaint sources

IP hygiene:

• Remove inactive IPs from SNDS
• Update when infrastructure changes
• Document IP purposes

Correlation:

• Compare SNDS with ESP metrics
• Check blocklists alongside SNDS
• Monitor authentication separately

When to Escalate

Microsoft has a sender support process for delisting requests:

Go to sender.office.com to submit:

• Delisting requests
• False positive reports
• General sender support

Include:

• Affected IP addresses
• Evidence of good practices
• Steps you've taken to resolve

Response time: 24-72 hours typically.

If you're seeing red status in SNDS and need help diagnosing the cause, schedule a consultation. Microsoft issues often have different root causes than Gmail problems.

Sources

• Microsoft: SNDS Home
• Microsoft: JMRP Setup
• Microsoft: Sender Support
• Microsoft: Outlook.com Postmaster

---

v1.0 · March 2026