推荐 postfix+mailscanner 主要是有 mrtg支持 结构上不如postfix+am[12]

Still Deliver Silent Viruses = no (通知收信者有人寄送Silent Virus[偽造地
址病毒]給你)
Quarantine Silent Viruses = no (不隔離Silent Virus,以免佔空間)
Mark Infected Messages = no (通知收信者去閱讀那些替代原本被感染的附件的
感染報告檔案)
Mark Unscanned Messages = no (若檔案未經掃瞄,通知你的使用者不要去使用這
個郵件。)
Rebuild Bayes Every = 3600
SpamAssassin Auto Whitelist = yes
-----------------------------------------------------------

增加目錄
]#mkdir /var/spool/postfix/hold --MailScanner 該掃描的郵件目錄
]#mkdir /var/spool/MailScanner/spamassassin
]#chown postfix.postfix /var/spool/postfix/hold

修改/var/spool/MailScanner裡目錄的屬性
]#chown postfix.postfix /var/spool/MailScanner/incoming
]#chown postfix.postfix /var/spool/MailScanner/quarantine
]#chown postfix.postfix /var/spool/MailScanner/spamassassin

關掉postfix,啟動MailScaner,
]#/etc/rc.d/init.d/postfix stop
]#/etc/rc.d/init.d/MailScanner start

工作原理如下:

SMTP 25--->MailScanner啟動Postfix MTA--->HOLD
Queue(/var/spool/postfix/hold)
--->Spam & Virus Check--->MDA(Procmail)--->/var/spool/mail
|
|--->/var/spool/MailScanner/spamassin or quarantine & send notify

---------------------------------------------------------------------------------------------------------------------------------------------

13-2.MailScanner for Postfix 1.x的設定方式

Mailscanner在postfix 1.x跟2.x的工作原理稍有不同,由於Postfix 1.x不支援
MailScanner啟動Postfix的Hold Queue動作,
因此要啟動兩個postfix,分別做為incoming跟delivery的動作,工作原理如下:

SMTP 25--->Postfix.in->Queue in /var/spool/postfix.in--->MailScanner啟動
--->Spam & Virus Check--->Postfix--->MDA(Procmail)--->/var/spool/mail
|
|--->/var/spool/MailScanner/spamassin or quarantine & send notify

所以會看到兩個postfix的master process,MailScanner for Postfix 2.x版只有
一個.

9998 ? S 0:00 [master]
10001 ? S 0:00 \_ [pickup]
10003 ? S 0:01 \_ [nqmgr]
10065 ? S 0:00 [master]
10070 ? S 0:00 \_ [pickup]
10071 ? S 0:00 \_ [nqmgr]
10084 ? S 0:00 [MailScanner]
10085 ? S 2:46 \_ [MailScanner]
10089 ? S 3:05 \_ [MailScanner]

先copy一份postfix的設定檔