Install post fix ternyata gak begitu rumit. gue hanya 2 hari pusing. gak seperti yg laen hehehehe.



tahap installasi

1. download file postfix

fetch http://www.gcfl.net/postfix-download/official/postfix-2.0.10.tar.gz

2. extract file nya dan masuk ke direktorynya

tar fxzv postfix-2.0.10.tar.gz

cd postfix-2.0.10
3. compile

make

4. buat group dan user postfix

pw groupadd postdrop

pw useradd postfix -g postfix -d /dev/null -s /nonexistent


5. install (akan muncul pertanyaan)

make install

install_root: [/]
tempdir: [/tmp/snapshot-20011008]
config_directory: [/etc/postfix]
daemon_directory: [/usr/libexec/postfix]
command_directory: [/usr/sbin]
queue_directory: [/var/spool/postfix]
sendmail_path: [/usr/lib/sendmail]
newaliases_path: [/usr/bin/newaliases]
mailq_path: [/usr/bin/mailq]
mail_owner: [postfix]
setgid_group: [postdrop]
manpages: [/usr/local/man]
sample_directory: [/etc/postfix]
readme_directory: [no]
6. setelah install sukses, edit file main.cf di /etc/postfix perhatikan baris berikut dan edit seperlunya
edit /etc/postfix/main.cf
myhostname = ?????? <<-- rubah dengan hostname atau virtual domain
7. Update /etc/syslog.conf to log mail to /var/log/maillog
echo "mail.info /var/log/maillog" >> /etc/syslog.conf
touch /var/log/maillog
8. buat direktory postfix di /usr/local/bin/postfix dan copy file bin dari source ke dir tersebut
mkdir /usr/local/bin/postfix
cp bin/* /usr/local/bin/postfix
9. update file sendmail, mailq dan newaliases
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 0 /usr/sbin/sendmail.OFF /usr/bin/newaliases.OFF /usr/bin/mailq.OFF
ln -s /usr/local/postfix/sendmail /usr/sbin/sendmail
ln -s /usr/local/postfix/sendmail /usr/bin/mailq
ln -s /usr/local/postfix/sendmail /usr/bin/newaliases
mv /etc/rc.sendmail /etc/rc.sendmail.bak
10. jalankhan newaliases 
/usr/bin/newalias
11. jalankan postfix dan masukkan postfix ke /etc/rc.local supaya otomatis ruuning pada saat reboot
/usr/sbin/postfix start
echo /usr/sbin/postfix start >> /etc/rc.local
12. test telnet localhost 25
$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.kopegtel-pontianak.or.id.
Escape character is '^]'.
220 chemod.kopegtel-pontianak.or.id ESMTP Postfix

and testing lah hehehehee
done
NB: Jika ada pertanyaan silakan gabung ke #indofreebsd@irc.dal.net dan 
silakan tanyakan tentang postfix kepada siapa ajah yg ada disana :P. jangan ditanya kenapa bisa seperti ini soalnya saya juga gak tahu hehehe