《Linux菜鳥入門2》mail服務

配置DNS

mailwestos.example.com

vim /etc/named.rfc1912.zones

  zone "westos.com" IN {

         type master;

         file "westos.com.zone";

        allow-update { none; };

  };

  zone "linux.com" IN {

          type master;

         file "linux.com.zone";

         allow-update { none; };

  };

cp -p named.localhost westos.com.zone

vim /var/named/westos.com.zone 

cp -p westos.com.zone linux.com.zone

vim /var/named/linux.com.zone 

systemctl restart named

systemctl stop firewalld

vim /etc/postfix/main.cf 

maillinux.example.com

    

●別名發送:

linux.com 主機向 westos.com主機發送郵件，使用別名發送

vim /etc/aliases

    vim /etc/moreusers 

        root

        student

 postalias /etc/aliases

 systemctl restart postfix.service 

4.出站地址假裝

server (westos.com)主機:

vim /etc/postfix/generic 

postmap /etc/postfix/generic

postconf -d | grep generic 會出來一段字符,選擇最後的一行字符(以下)，進行復制:

smtp_generic_maps =

postconf -e "smtp_generic_maps = hash:/etc/postfix/generic" ##此處用到上條語句複製的字符

systemctl restart postfix.servic

5.檢測25端口

下載 yum install telnet -y

250 2.0.0 Ok: queued as 38E0C17E849

quit ##退出telnet

221 2.0.0 Bye

Connection closed by foreign host.