Who This Is For / When to Use
Email senders who want visibility into Microsoft Outlook/Hotmail deliverability.
Accounts troubleshooting spam placement, blocks, or reputation issues.
Teams exporting IP data for compliance or deliverability analysis.
What Microsoft SNDS Tracks
Microsoft SNDS (Smart Network Data Services) provides visibility into how Microsoft evaluates your sending IPs.
This integration surfaces:
IP reputation signals
Spam filtering results
Complaint rates
Spam trap activity
Message volume metrics
Accessing the Microsoft SNDS Dashboard
Go to Settings > Email Services > Postmaster Tools.
Select Microsoft SNDS from the left menu.
IP Availability and Shared IP Notice
If your account uses shared IPs, you may see an “IP not found in your account” message.
This means:
Microsoft does not expose per-IP SNDS data for shared IPs.
Detailed IP-level metrics are only available for dedicated IP accounts.
CSV exports and feedback loop controls may be limited.
Viewing IP Activity Data
Time Range Selection
Use the date range selector to change the reporting window (for example, last 7 days).
Key Dashboard Fields
Each row represents IP activity for a reporting period.
Activity Period – Time window Microsoft evaluated.
RCPT Commands – Total recipients accepted by Microsoft servers.
DATA Commands – Total message payloads processed.
Message Recipient – Delivered recipient count.
Filter Result – Spam filtering status.
Complaint Rate – User-reported spam complaints.
Trap Message Period – Days spam traps were triggered.
Understanding Filter Results and Status Indicators
Filter Results
Spam < 10% – Healthy sending reputation.
10% < Spam < 90% – Elevated spam filtering risk.
Red Days – Days where spam thresholds were exceeded.
Blocked Status
No – IP is not blocked.
Yes – IP is actively restricted by Microsoft.
Trap Hits
Indicates spam trap detections.
Any value above 0 requires immediate list hygiene review.
Complaint Rate Guidelines
Target complaint rate: < 0.1%
Higher values signal recipient dissatisfaction and risk future filtering.
Downloading SNDS CSV Reports
You can export SNDS data for offline analysis.
Select your desired date range.
Click Download CSV.
Use CSV exports to:
Track historical trends
Share deliverability reports
Audit campaign volume and behavior
Handling IP Reputation Issues
Recommended Actions
Review spam percentage and red days.
Remove inactive or invalid contacts.
Reduce sudden volume spikes.
Improve email content relevance.
Warm up new sending IPs gradually.
If an IP Is Blocked
Confirm block status in the dashboard.
Address list quality and complaint sources.
Submit a delisting request through Microsoft Outlook Support.
FAQ
What is Microsoft SNDS?
Microsoft SNDS is a reporting service that shows how Microsoft evaluates your sending IPs, including spam filtering, complaints, and trap activity.
How do I know if my IP is blocked?
Check the Blocked field in the IP status dashboard. A value of Yes means Microsoft is actively restricting the IP.
Why do I see “No data available” for some days?
Microsoft only reports data when an IP sends a meaningful volume (typically 100+ emails) to Microsoft recipients in a day. Lower volumes are hidden for privacy reasons.
What causes high spam rates?
Common causes include poor list hygiene, purchased lists, irrelevant content, and sudden increases in sending volume.
What should I do if there are spam trap hits?
Immediately clean your mailing list, remove inactive contacts, and review opt-in practices to prevent further reputation damage.
Can I track historical performance?
Yes. Use the dashboard for recent trends and Download CSV for long-term historical analysis.