參考文檔：
http://blog.5ilinux.com/archives/2006/05/postfix_cyrussa.html
http://www.extmail.org/forum/archive/2/0510/563.html

wget ftp://postfix.cn99.com/postfix/official/postfix-2.2.10.tar.gz

tar zvxf postfix-2.2.10.tar.gz

下載VDA補丁,使postfix支持磁盤限額
wget http://web.onda.com.br/nadal/postfix/VDA/postfix-2.2.10-vda.patch.gz

gzip -d? postfix-2.2.10-vda.patch.gz

chkconfig --level 2345 sendmail off

安裝postfix之前添加相關的用戶＆用戶組
groupadd postfix -g 1000
groupadd postdrop
useradd postfix -u 1000 -g postfix -G postdrop
groupadd vmail -g 1002
useradd vmail -u 1002 -g 1002
mkdir /opt/virtual
chown vmail:vmail /opt/virtual
chmod -R 771 /opt/virtual

cd postfix-2.2.10
打補丁
patch -p1 < ../postfix-2.2.10-vda.patch

make tidy

make makefiles 'CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include/ -DUSE_SASL_AUTH -I/usr/local/include/sasl' \
'AUXLIBS=-L/usr/local/mysql/lib/ -lmysqlclient -lm -lz -L/usr/local/lib -lsasl2'

make
make install

mv /etc/aliases /etc/aliases.old
ln -s /etc/postfix/aliases /etc/aliases
echo 'root: admin@example.com'>>/etc/postfix/aliases
/usr/bin/newaliases

touch /etc/postfix/mysql/virtual_alias_maps.cf
touch /etc/postfix/mysql/virtual_domains_maps.cf
touch /etc/postfix/mysql/virtual_mailbox_maps.cf
touch /etc/postfix/mysql/virtual_limit_maps.cf

cd /etc/postfix
postconf -n > main2.cf
mv main.cf main.cf.old
mv main2.cf main.cf

vi /etc/postfix/main.cf
myhostname = mail.example.com???????? # mail.example.com是安裝Postfix軟件的主機名
mydomain = example.com??????????????? # example.com是安裝Postfix軟件的主機名中的域名部分
myorigin = $mydomain
mydestination =
alias_maps = hash:/etc/aliases
home_mailbox = Maildir/?????????????? # 使用Maildir作為郵件的存儲格式

#=====================MySQL=====================
virtual_alias_maps = mysql:/etc/postfix/mysql/virtual_alias_maps.cf
virtual_mailbox_base = /opt/virtual
virtual_mailbox_domains = mysql:/etc/postfix/mysql/virtual_domains_maps.cf
virtual_mailbox_limit = 102400000
virtual_mailbox_maps = mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf
virtual_minimum_uid = 1002
virtual_uid_maps = static:1002
virtual_gid_maps = static:1002
virtual_transport = virtual
#"virtual_gid_maps"和"virtual_uid_maps"是postfix用戶的gid和uid， "virtual_minimum_uid"應當≤"virtual_uid_maps"，

"virtual_mailbox_limit"是每個郵箱的大小。

#=====================Quota=====================
virtual_create_maildirsize = yes
virtual_mailbox_extended = yes
virtual_mailbox_limit_maps = mysql:/etc/postfix/mysql/virtual_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = Sorry, the user's maildir has overdrawn his diskspace quota, please try again later.
virtual_overquota_bounce = yes
#virtual_trash_count=yes
#virtual_trash_name=.Trash

#====================SASL======================
smtpd_recipient_restrictions =
?permit_mynetworks,
?permit_sasl_authenticated,
?reject_non_fqdn_hostname,
?reject_non_fqdn_sender,
?reject_non_fqdn_recipient,
?reject_unauth_destination,
?reject_unauth_pipelining,
?reject_invalid_hostname
?#reject_rbl_client opm.blitzed.org,
?#reject_rbl_client list.dsbl.org,
?#reject_rbl_client bl.spamcop.net,
?#reject_rbl_client sbl-xbl.spamhaus.org
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes

#=============================================
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/local/man
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
unknown_local_recipient_reject_code = 550

編輯cf配置文件

vi /etc/postfix/mysql_virtual_alias_maps.cf

user = postfix
password = postfix
hosts = localhost
dbname = postfix
table = alias
select_field = goto
where_field = address
additional_conditions = AND active = '1'

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vi /etc/postfix/mysql_virtual_domains_maps.cf

user = postfix
password = postfix
hosts = localhost
dbname = postfix
table = domain
select_field = description
where_field = domain
additional_conditions = AND active = '1'

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vi /etc/postfix/mysql_virtual_mailbox_maps.cf

user = postfix
password = postfix
hosts = localhost
dbname = postfix
table = mailbox
select_field = maildir
where_field = username
additional_conditions = AND active = '1'

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vi /etc/postfix/mysql_virtual_limit_maps.cf

user = postfix
password = postfix
hosts = localhost
dbname = postfix
table = mailbox
select_field = quota
where_field = username
additional_conditions = AND active = '1'

啟動和停止postfix服務
/usr/sbin/postfix start
/usr/sbin/postfix stop

設置Postfix開機自動運行，在/etc/rc.local中增加“/usr/sbin/postfix start&”。
注：①系統已經打開了Postfix的TLS支持，如果你需要這項功能可以參考Postfix發行包中的TLS_README文檔進行配置。
? ? ②你可以使用一個叫pflogsumm.pl的perl腳本對postfix的日志進行分析，詳細的情況見：http://jimsun.linxnet.com/postfix_contrib.html。