以Centos 系统为例，确保服务器可以正常连接外网

Centos 6.5 下面默认 安装 postfix

查看

rpm -qa | grep postfix

postfix-2.6.6-2.2.el6_1.x86_64

配置邮件客户端

set from=user@163.com

set smtp=smtp.163.com

set smtp-auth-user=user@163.com

set smtp-auth-password=UserPassword

set smtp-auth=login

发送测试邮件 echo "test" | mail -s "subject" user@163.com

登录邮箱查看邮件

应用案列，监控服务器内存每半小时检查一次

监控脚本 + crontab

#!/bin/bash

FreeMem=`free -m | awk 'NR==3 {print $NF}'`

Host="192.168.10.32 localhost32.localdomain"

Infor_mesage="Now $Host memory is $FreeMem"

if [ $FreeMem -lt 1200 ];then

echo $Infor_mesage | tee /tmp/message.txt

/bin/mail -s "`date +%F-%T` $Infor_mesage" user@163.com < /tmp/message.txt

else
exit 1

fi

#monitor sys memory */30 * * * * /root/scripts/monitor.sh &> /dev/null