SMTP简单邮件协议的服务配置

1.desktop操作：
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.zonevim /var/named/westos.com.zone





cp -p westos.com.zone linux.com.zonevim /var/named/linux.com.zone

systemctl restart namedsystemctl stop firewalld
vim /etc/postfix/main.cf











2.server操作：













3.别名发送:要求:desktop（linux.com） 主机向 server(westos.com)主机发送邮件，使用别名发送:mail lzt@westos.com (server主机里没有lzt用户)vim /etc/aliases


vim /etc/moreusers root student

postalias /etc/aliases systemctl restart postfix.service

4.出站地址伪装server (westos.com)主机:vim /etc/postfix/generic

postmap /etc/postfix/genericpostconf -d | grep generic 会出来一段字符,选择最后的一行字符(如下)，进行复制:smtp_generic_maps =postconf -e "smtp_generic_maps = hash:/etc/postfix/generic" ##此处用到上条语句复制的字符systemctl restart postfix.servic

5.检测25端口软件下载 yum install telnet -y



250 2.0.0 Ok: queued as 38E0C17E849quit ##退出telnet221 2.0.0 ByeConnection closed by foreign host.