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UCEPROTECT Network
UCEPROTECT Level 3
ASN-level listing — extreme and rarely used by mainstream MTAs.
- DNS zone
dnsbl-3.uceprotect.net- Target
- IP addresses
- Severity
- low
What it lists
Level 3 lists entire autonomous systems with chronic abuse. Listings affect every IP in the ASN regardless of individual behaviour.
Who gets listed
ASNs with persistent, system-wide abuse.
Reputation impact
Marginal for most senders. Mainstream mailbox providers do not consult Level 3.
How to delist
Realistically requires changing providers. Paid removal exists but the ASN must clean up.
Check your domain or IP against UCEPROTECT Level 3
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