默认的mail不能对外发邮件,修改/etc/mail.rc，增加以下内容：

set from=report3@163.com
set smtp=smtp.163.com
set smtp-auth-user=report3
set smtp-auth-password=password
set smtp-auth=login

测试：

echo "mailbody" | mail -s "subject" abc@qq.com

mail -s "mail subject" abc@qq.com < yourbody.txt

检查abc@qq.com有无收到邮件

linux使用mail发邮件