最近只要一打开mac终端就显示You have mail.
强迫症忍不了啊。
在网上找了下解决方案：

Some apps send mail internally for various reasons.
To read the mail, simply enter

mail
after reading it you have the option to delete it (d) or leave it alone
when done use
q
for quit.
For more mail info,
man mail
will get you all you need.

输入后 发现说文件放在 var/mail/{user}
操作太复杂，直接sudo -s rm *
清空 里面的异常文件。完活。