shell调用smtp发送邮件

#!/bin/bash
smail(){
        smtp="mail.mailadd.com 25" # 邮件服务器地址+25端口
        smtp_domain="mailadd.com" # 发送邮件的域名，即@后面的
        FROM="[e-mail]" # 发送邮件地址
        RCPTTO=$1 # 收件人地址
        username_base64="xxxxxxxxxxxxxxxxx" # 用户名base64编码
        password_base64="xxxxxxxx" # 密码base64编码
        local_ip=`ifconfig|grep Bcast|awk -F: '{print $2}'|awk -F " " '{print $1}'|head -1`
        local_name=`uname -n`
        ( for i in "ehlo $smtp_domain" "AUTH LOGIN" "$username_base64" "$password_base64" "MAIL FROM:<$FROM>" "RCPT TO:<$RCPTTO>" "DATA";do
                echo $i
                sleep 4
        done
        echo "Subject:server alert"
        echo "From:<$FROM>"
        echo "To:<$RCPTTO>"
        echo ""
        echo "server $local_name up, ip:$local_ip"
        echo "."
        sleep 2
        echo "quit" )|telnet $smtp
}
smail [e-mail] # 这里参数为收信地址