You have new mail in /var/spool/mail/root

centos7.5

查看邮件的方式:

[root@web01 code]# yum -y install mailx　　#安装mailx

[root@web01 code]# mail　　　　　　　　　#执行mail命令,显示如下
Heirloom Mail version 12.5 7/5/10. Type ? for help.
"/var/spool/mail/root": 3 messages 3 new
>N 1 Mail Delivery System Tue Jan 15 10:53 92/2986 "Undelivered Mail Returned "
N 2 Mail Delivery System Tue Jan 15 11:54 92/3404 "Undelivered Mail Returned "
N 3 Mail Delivery System Tue Jan 15 16:18 92/3405 "Undelivered Mail Returned "
&

& p　　　　#输入p回车可以看最新的邮件
Message 1:
From MAILER-DAEMON Tue Jan 15 10:53:56 2019

命令说明:

p	查看最新邮件
q	退出当前查看
数字	查看第几封邮件