Postfix郵件伺服器

Postfix與Sendmail一樣都是Linux上很著名的電子郵件伺服器，但好設定很多
##安裝前記得將sendmail停用並設定開機不啟動

相關套件:
postfix.i386

相關目錄:
/etc/postfix
/etc/postfix/main.cf   //設定檔

設定:
# vim /etc/postfix/main.cf  //修改為

myhostname = a238.snpy.org mydomain = a238.snpy.org inet_interfaces = all       //傾聽所有，以下四個不能同時啟用 #inet_interfaces = $myhostname #inet_interfaces = $myhostname, localhost #inet_interfaces = localhost mydestination = $myhostname, localhost.$mydomain, localhost //如果同時管好幾個網域，ex:a238-a240.snpy.org //加在mydestination以逗號分隔

#/etc/init.d/postfix restart    

Relay相關設定:
# vim /etc/postfix/main.cf

#mynetworks_style = class #mynetworks_style = subnet #mynetworks_style = host //設定那些情況會Relay，預設為subnet //subnet:表示以網卡的subnet為準 //class表示已ip class為準 //host表示為localhost #mynetworks = 168.100.189.0/28, 127.0.0.0/8 #mynetworks = $config_directory/mynetworks #mynetworks = hash:/etc/postfix/network_table //設定後會忽略mynetworks_style... //可以詳細規定接受relay範圍

測試:
# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 a238.snpy.org ESMTP Postfix

# telnet 140.137.215.238 25
Trying 140.137.215.238...
Connected to 140.137.215.238 (140.137.215.238).
Escape character is '^]'.
220 a238.snpy.org ESMTP Postfix

再來可用web mail寄信給tom，再用mutt收信看看
或可以到/var/log/maillog檢查有沒收到外部信件