Where to apply Spamhaus blocklists for effective email filtering
Spamhaus produces many different DNSBLs (blocklists). The question is which ones to apply where? This simple guide provides you with all the information you need.
TOOLS & PLUGINS
Access the free testing tool for DNSBL users: The Blocklist Tester
Use the Blocklist Tester (BLT) to check if your email servers are correctly configured to use the Spamhaus Blocklists.
The BLT sends a series of test emails to your nominated email address. If your server is correctly set up to query our blocklists, all the emails should be rejected. The BLT provides a summary of exactly what emails have been rejected or delivered.
Get the SpamAssassin plugin
Find how to use DQS at its best with the Apache Foundation's open-source anti-spam platform, SpamAssassin. Find the plugin and configuration files here.
Get the Rspamd plugin
Find how to use DQS at its best with the open-source anti-spam platform, Rspamd. Find the plugin and configuration files here.
TECHNICAL DOCUMENTATION
Configuration examples
Whether you're looking for guidelines on filtering SMTP sessions or want to know how to use DQS with an MTA, this will have you covered.
Understanding Spamhaus Data
From definitions and acronyms to how to use the data in a real-world scenario - this is a great introduction to our data.
ADDITIONAL RESOURCES
To help you get set up
Blog
Understanding a malicious email's source code
eBook
Getting the most from email filtering
Blog
Top 10 (+1) tips for running your own email server
Best Practice
Getting DNSBLs and email filtering right
More to explore
Blog
DBL increasing accuracy with Hostnames
Webinar
Beyond IP and Domain Reputation
Blog
Why you should use domain and hash blocklists
Blog
Email blocklists – buy cheap, buy twice!
MANAGING YOUR SUBSCRIPTION
To review and manage your subscription, simply login to the Spamhaus portal. From the portal, you'll also be able to review usage, FAQs, and the DQS manual. Login details should have already reached your inbox from welcome@service.spamhaus.com.