邮件系统换域名

# 更新主配置文件
sudo nano /etc/postfix/main.cf

# 修改以下配置项
myhostname = mail.newdomain.com
mydomain = newdomain.com
myorigin = $mydomain
inet_interfaces = all
inet_protocols = ipv4
relayhost =

# 更新DNS记录
sudo nano /etc/bind/named.conf.local

# 添加以下记录
zone "newdomain.com" {
    type master;
    file "/etc/bind/db.newdomain.com";
};

# 创建DNS区域文件
sudo nano /etc/bind/db.newdomain.com

# 添加以下内容
$TTL    604800
@       IN      SOA     ns1.newdomain.com. admin.newdomain.com. (
                              2         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      ns1.newdomain.com.
@       IN      MX      10 mail.newdomain.com.

# 重启服务
sudo systemctl restart postfix
sudo systemctl restart bind9