• .. is a highly configurable postfix policy daemon, postfix content filter and postfix log parser
• .. aims to reduce your spam significantly
• .. tries to be as easy as possible for the admin.
• .. works in small, one mailserver only environments as well as in complex distributed multi mailserver, multi filter server environments
• .. does not cost you a dime because it is free open source software
• .. content filter is a middle ware between existing spam and virus filters and postfix

In short, what does it do/use ?

• Implements postfix policy API for fighting Spam at the frontier
• Fully capable content filter for fighting Spam on a higher level
• DNSBL and custom blacklist, custom whitelists and greylisting
• Implements virus scanning via ClamAV (other AV software planned)
• Integrates anti-spam filtering via SpamAssasin, DSPAM, CRM114, Bogofilter, Razor, ..
• Full support of  SPF (Sender Policy Framework)
• Sign and/or verify DKIM
• Archive mail gateway (directory or tar archives)
• Association proves (sender IP <-> sender domain)
• Re-implements the basic postfix rejections, but with scoring
• Geo Weighting
• Sender throttling for multiple usage scenarios (per sender address, per sender domain, per “account”)
• Honeypot ability for tailoring spam fighting to your environment and/or collecting spam mails for training

You should consider using it if ..

• You have a linux mail server
• You don’t like spam
• You have a very small setup and don’t want to break a fly on the wheel
• You have a large distributed setup and hassle with to many different configurations

Currently decency is in testing. The CPAN Modules has been released and all modules run on testing mail servers to figure out as much runtime bugs as possible. The description will be released as i wrote them within the next weeks here on this website. You can download the testing versions here:
Installation and download