milter-greylist
Hi, A few words on milter-greylist , especially because the new version (3) is now RC6 and looks pretty stable. What are the features of milter-greylist? Per-domain and per-user settings. Friendly networks whitelisting Multi-MX sync (database is replicated many mail servers if needed) SMTP-AUTH support SPF records: can be configured not to impose GreyListing to messages that are SPF-compliant Access lists with DNSbls This last option is new in version 3. It is very nice: it allows one to configure milter-greylist to impose GreyListing if the source IP is on (configurable) DNS black lists (DNSbls). I've installed it and it decreased the number of messages/day by about 60%. I only had to whitelist one server.