Cloud Server for Email
cloudserverforemail.com · infrastructure@cloudserverforemail.com · +372 602 3545
EU-Based Infrastructure
Operating Since 2015
Operating Since 2015
Microsoft SNDS Monitoring Guide
Smart Network Data Services for Outlook.com Delivery Management
Version 2026-04 · Cloud Server for Email
What is SNDS?
Microsoft's Smart Network Data Services (SNDS) provides per-IP data about your sending reputation at Outlook.com, Hotmail.com, and Live.com. It shows: IP traffic volume, complaint rate, trap hit rate, and overall IP status (Green/Yellow/Red).
SNDS Registration
- Go to sendersupport.olc.protection.outlook.com/snds
- Sign in with Microsoft account
- Click "Request Access" — enter the IP addresses or IP ranges to monitor
- Complete email verification from the registrant email address at the IP WHOIS record
- Access granted within 1-2 business days
- Register all sending IPs, not just your current problem IPs
IP Status Codes
| Status | Meaning | Delivery Impact | Action |
|---|---|---|---|
| Green | Clean sender, good reputation | Delivery to inbox expected | Monitor; maintain |
| Yellow | Elevated complaint/trap rate | Increased filtering; some mail to spam | Investigate complaint source; reduce volume |
| Red | High complaint or trap rate | Significant blocking; many messages rejected | Immediate volume pause; root cause analysis |
| N/A | Insufficient data | Unknown; new IPs start here | Normal during warming; will resolve as volume builds |
Key SNDS Metrics
| Metric | Target | Warning | Critical |
|---|---|---|---|
| Complaint rate | <0.1% | 0.1–0.3% | >0.3% |
| Spam trap hits | 0 | Any trap hit | Multiple trap hits |
| Daily message count | Consistent with volume plan | Unexpected spikes | Volume > 10× baseline |
Remediation for Yellow/Red Status
- Pause sending from affected IP immediately
- Identify the specific campaign or list segment that triggered the status change
- Check last 48-72 hours of campaigns for unusual segments (purchases, reactivations, cold lists)
- Remove the problem segment from the sending rotation
- Implement list hygiene: suppress all 180-day inactive subscribers
- Send only to high-engagement (30-day openers) for first 2 weeks of recovery
- Monitor daily until SNDS shows Green for 5+ consecutive days
- Optionally: submit JMRP enrollment for ongoing complaint feedback data
JMRP: Junk Mail Reporting Program
JMRP provides per-message complaint feedback when Outlook.com users mark your mail as junk. To enroll: sendersupport.olc.protection.outlook.com/jmrp. Provide the email address where complaint feedback should be delivered. Process each JMRP complaint by adding the recipient to your global suppression list immediately.
SNDS data is updated daily. Yellow status alone is not a blocklist — it indicates increased filtering risk. Red status indicates active blocking that requires immediate remediation and may require Microsoft postmaster contact for resolution.