To use the spam origin blacklist effectively, follow these guidelines:

Understand the purpose: The spam origin blacklist (PSBL) focuses on listing the most severe offenders. It is recommended to use it for outright blocking, rather than incorporating it into a scoring system. Using it for scoring purposes may consume resources without providing any significant advantage.

DNS Zone: The PSBL blacklist can be accessed through the DNS Zone "psbl.sorbl.com". Configure your email server or filtering system to query this DNS Zone during the email filtering process.

Disclaimer: It's important to note that while efforts have been made to minimize false positives, no system is perfect. By using this free service, you assume the risk associated with it. If you do not agree to this disclaimer, you are advised not to use the PSBL service.

Total Unique IP Addresses Listed: 15239. Total IP Addresses Processed: 27255.