Postfix 邮件服务器

DNS 服务 （系统需要配置静态 IP 地址）

yum install bing* -y

一、配置 NDS 域名解析；

　　直接添加以下内容：

[root@mail ~]# cat /etc/named.conf 

zone "wangxiaojing.com" IN {
        type master;
        file "wangxiaojing.com.zone";
              allow-update{none;};
};

zone "2.16.172.in-addr.arpa" IN {
        type master;
        file "2.16.172.local";
              allow-update{none;};
};

二、配置正向解析

[root@mail ~]# cat /var/named/wangxiaojing.com.zone 
$TTL 1D
@    IN SOA    @ dns.wangxiaojing.com.  (
                    0    ; serial
                    1D    ; refresh
                    1H    ; retry
                    1W    ; expire
                    3H )    ; minimum
    NS    @
    A    127.0.0.1
    AAAA    ::1
IN       NS      dns.wangxiaojing.com.
        IN       MX   10     dns.wangxiaojing.com.
dns     IN       A           172.16.2.18
mail    IN       CNAME       dns
pop3    IN       CNAME       dns
smtp    IN       CNAME       dns
imap4    IN       CNAME       dns

三、配置反向解析

[root@mail ~]# cat /var/named/2.16.172.local 
$TTL 1D
@    IN SOA    @ dns.wangxiaojing.com. (
                    0    ; serial
                    1D    ; refresh
                    1H    ; retry
                    1W    ; expire
                    3H )    ; minimum
    NS    @
    A    127.0.0.1
    AAAA    ::1
IN   NS  dns.wangxiaojing.com.
18     IN   PTR dns.wangxiaojing.com.

四、启动测试；

chkconfig named on
service named start

五、配置 /etc/resolv.conf 

（bind 重启之后配置会丢失,编辑保存就行）

search wangxiaojing.com
nameserver 172.16.2.18
nameserver 8.8.8.8
nameserver 8.8.4.4

六、检测 NDS 解析：

[root@mail ~]# nslookup -qt=mx mail.wangxiaojing.com
*** Invalid option: qt=mx
Server:        172.16.2.18
Address:    172.16.2.18#53

mail.wangxiaojing.com    canonical name = dns.wangxiaojing.com.
Name:    dns.wangxiaojing.com
Address: 172.16.2.18

  配置注意细节 " . " 。