Email blocklist · DNSBL · IP addresses MON · 14 SEP 2026

Passive Spam Block List

Operated by Andrew Bashelor · United States · Zone psbl.surriel.com

About

Maintained by a small team; conservative listing criteria emphasise correctness over coverage. A useful complement to higher-coverage lists like Spamhaus.

Listing criteria

Passive listings sourced from automated honey-pot traps. Conservative listing criteria; relatively low false-positive rate.

How to query

For an IP address 1.2.3.4, query reversed-octets-dot-zone:

dig +short 4.3.2.1.psbl.surriel.com

A returned IP (such as 127.0.0.2) means listed. Each blocklist has its own set of return codes meaning different things; the operator's documentation explains theirs.

Operator site Delisting / lookup ›