Dcc

http://flakshack.com/anti-spam/wiki/index.php?page=Installing+DCC

wget http://www.rhyolite.com/dcc/source/dcc.tar.Z

./configure --with-uid=mail --bindir=/usr/bin --with-db-memory=48 --with-max-db-mem=96 --without-IPv6 --enable-64-bits --with-DCC-MD5 --disable-dccm

make

make install

DCCM_REJECT_AT -> dcc_conf

# Leave DCCM_REJECT_AT blank until you are confident that most sources of

#   solicited bulk mail have been whitelisted.  Then set it to the number

#   that defines "bulk mail" for your site.

DNSBL_ARGS

Sites with more than one greylist server should arrange to flood data among them by adding lines to /var/dcc/grey_flod files in the same format as /var/dcc/flod files. Flooding among greylist servers uses port 6276 by default, and so that port may need to be opened in firewalls.