ACL Policy Daemon communicates with the Postfix MTA using the Policy Delegation Protocol, implementing an ACL (Access Control List) system. Key features: greylisting with flexible storage using memory for fast responses or disk for high persistence, SPF validation, control of messages by day/time, variable message size limits per domain or email, multiple RBL checking, and various ACLs available to use and combine. The configuration is simple and intuitive.
License: GNU General Public License (GPL)
Changes:
A new country ACL to discover where the connection is coming from. A new stress ACL to detect if Postfix is under heavy load. A new memcached backend for greylisting, greatly improving performance and memory control. Packaging configuration for deb and RPM.
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