Guardian Mail

Abusix Guardian Mail is a suite of curated DNSRBLs designed to protect inbound and outbound mail servers. Guardian Mail provides the most accurate, comprehensive, and innovative blocklists on the internet.

Getting started with Guardian Mail

Configuring Mail Servers

Delisting Overview

Delisting FAQ

Blocklist FAQ

Blocklist Check Providers

Beta Zones

Return Codes

Production Zones

Using Rsync and rbldnsd

Executing dig, host, and nslookup queries

Comparison Tool

See legacy Guardian Mail docs.