this is obsolete doc -- see http://doc.nethence.com/ instead

Setting up milter-greylist on FreeBSD 8 

Install the milter, 

pkg_add -r milter-greylist 

cd /usr/local/etc/mail/ 

cp greylist.conf.sample greylist.conf 

chmod u+w greylist.conf 

provide an easy symlink, 

cd /etc/mail/ 

ln -s /usr/local/etc/mail/greylist.conf 

Edit its configuration, 

grep mailnull /etc/passwd 

grep mailnull /etc/group 

cd /etc/mail/ 

vi greylist.conf 

like, 

pidfile "/var/run/milter-greylist.pid" 

socket "/var/milter-greylist/milter-greylist.sock" 

dumpfile "/var/milter-greylist/greylist.db" 600 

dumpfreq 1 

user "mailnull:mailnull" 

quiet 

greylist 7m 

dumpfreq 1d 

autowhite 10d 

list "my network" addr { 127.0.0.1/8 10.0.0.0/8 192.168.0.0/16 } 

# This is a list of broken MTAs that break with greylisting. Derived from 

# http://cvs.puremagic.com/viewcvs/greylisting/schema/whitelist_ip.txt?rev=1.16 

list "broken mta" addr { \ 

... 

} 

# And here is the access list 

racl whitelist list "my network" 

racl whitelist list "broken mta" 

racl greylist default 

Ref. How to Setup milter-greylist Spam Blocking in Sendmail: http://www.howtogeek.com/50948/how-to-setup-milter-greylist-spam-blocking-in-sendmail/ 

Enable the milter at boot time and start it right away, 

cd /etc/rc.d/ 

cp /usr/local/etc/rc.d/milter-greylist ./ 

cd ../ 

cat >> rc.conf <<EOF9 

miltergreylist_enable="YES" 

EOF9 

rc.d/milter-greylist start 

date 

ls -lF /var/milter-greylist/ 

Setup the milter within Sendmail, 

  cd /etc/mail/ 

  vi $HOSTNAME.mc 

add, 

dnl j,{if_addr},{cert_subject},i,{auth_authen} are already enabled by default 

define(`confMILTER_MACROS_HELO', confMILTER_MACROS_HELO``, {verify}'') 

define(`confMILTER_MACROS_ENVRCPT', confMILTER_MACROS_ENVRCPT``, {greylist}'') 

INPUT_MAIL_FILTER(`greylist', `S=local:/var/milter-greylist/milter-greylist.sock, F=T, T=R:30s') 

note. no "define confINPUT_MAIL_FILTER" is needed, as "INPUT_MAIL_FILTER" populates it already. (ref. cf/README or https://www.sendmail.com/sm/open_source/docs/m4/adding_mailfilters.html) 

and apply, 

  make 

  make install 

  make restart 

Refs. 

package's DESCR 

/usr/local/share/doc/milter-greylist/README