Patterns

Install Postfix
mv /usr/sbin/sendmail /usr/sbin/sendmail.OFF
mv /usr/bin/newaliases /usr/bin/newaliases.OFF
mv /usr/bin/mailq /usr/bin/mailq.OFF
chmod 755 /usr/sbin/sendmail.OFF /usr/bin/newaliases.OFF /usr/bin/mailq.OFF
tar xfz postfix-2.3.7.tar.gz
cd postfix-2.3.7
make
groupadd -g 89 postfix
groupadd -g 90 postdrop
useradd -d /dev/null -s /bin/false -g postfix -u 89 postfix
make install

Install dkfilter
groupadd -g 91 dkfilter
useradd -d /dev/null -s /bin/false -g dkfilter -u 91 dkfilter
tar xfz dkfilter-0.11.tar.gz
cd dkfilter-0.11
perl -MCPAN -e shell
cpan>install Crypt::OpenSSL::RSA
cpan>install Mail::Address
cpan>install Net::DNS
cpan>install Net::Server
./configure –prefix=/usr/local/dkfilter
make install