apt-get install sendmail-bin -y

apt-get install sendmail -y

apt-get install sendmail-cf -y

apt-get install mailutils -y

-测试是否安装成功：

ps aux |grep sendmail

-配置,连接到任何服务器上

vim /etc/mail/sendmail.mc

-DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=127.0.0.1')

DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=0.0.0.0')

cd /etc/mail

mv sendmail.cf sendmail.cf~

m4 sendmail.mc > sendmail.cf

service sendmail restart

apt-get install mutt -y

#Debian 移除 sendmail

apt-get purge sendmail*