No time ..
decency - Anti-Spam fighting framework
is a highly configurable postfix policy daemon, SMTP content filter.
aims to reduce your spam significantly.
tries to be as easy as possible for the admin.
is designed to work in small, one mailserver setups 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.
has an interface to implement existing anti-spam solutions.
decency is close to beta, but not yet there. However, it has already passed months of production (yes, i can run it, but you shouldnt) and real time tests survived. Some modules have less and some have more. It's mostly a matter of not having the time to write the docu, cleanup unused stuff and so on.
At least you need perl 5.10
Archive::Tar 1.40 Cache::File Crypt::OpenSSL::RSA Data::Pager DateTime DBD::SQLite DBI DBIx::Connector Digest::MD5 Digest::SHA Email::Valid File::Path 2.07 File::Temp IO::String IO::YAML 0.08 Mail::Field::Received MIME::Lite MIME::Parser MIME::QuotedPrint Module::Build 0.2805 Mouse MouseX::NativeTraits Net::DNS::Resolver Net::Domain::TLD Net::LMTP Net::Netmask Net::Server::PreFork Net::SMTP Proc::ProcessTable Regexp::Common Regexp::IPv6 SQL::Abstract::Limit Storable Test::More Time::HiRes YAML
Depending on which modules you plan to use
# using MongoDB as database MongoDB => 0.35, # using LDAP as database Net::LDAP # using ClamAV ClamAV::Client # using a cache Cache::FastMmap Cache::Memcache Cache::Memcache::XS # should not be installed via perl .. rather by distri installer #Mail::SpamAssassin # should be installed via distri #Geo::IP