🚫 S5H
What it takes to get off a hand-curated DNSBL like s5h.net.
ℹ️ About This Blocklist
s5h.net is a small, hand-curated DNSBL run by a single security researcher. It catches IPs the operator has personally judged to be abusive — not an automated list.
What a Listing Means
The s5h operator has manually added this IP based on observed malicious or abusive sending behaviour.
🔢 DNSBL Return Codes
When listed, the DNSBL returns one of these 127.x.x.x addresses. The specific code indicates the reason for the listing.
| Return IP | Meaning |
|---|---|
| 127.0.0.2 | Listed in s5h.net DNSBL |
✅ How to Request Delisting
Use the self-service removal page, which clears most listings within about 30 minutes. Because the list is also curated by hand, evidence that the underlying problem is fixed (host cleaned, credentials rotated, account terminated) carries weight.
Request Removal from S5H ↗📚 Official Documentation
🔍 Check Your IP or Domain Against S5H
Run a live blacklist check against all 17 blocklists we monitor, including S5H.