Google Postmaster Tools V2 (Oct 2025):
- Replaced "High/Medium/Low/Bad" with binary Compliance Status
- Shows Pass/Fail for each requirement
- Spam Rate graph with 0.10% and 0.30% thresholds
Microsoft SNDS: Traffic-light system per IP:
- 🟢 Green: <10% flagged
- 🟡 Yellow: 10-90% flagged
- 🔴 Red: >90% flagged
Key Blocklists:
- Spamhaus — Most impactful, protects 3+ billion mailboxes
- SBL (spam IPs), XBL (compromised), PBL (policy), DBL (domains)
- Barracuda BRBL — Smaller ISPs and enterprises
- SURBL / URIBL — URL/domain blocklists in email content
🎯 Cardinal rule: Fix the root cause BEFORE requesting delisting.
Sign in to keep track of what you have read.