帮忙看看一封邮件发送邮件老是不成功,系统给回复的东西,This is the Postfix program at ho

帮忙看看一封邮件
发送邮件老是不成功,系统给回复的东西,
This is the Postfix program at host slave.mail27.cn4e.com.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients.It's attached below.
For further assistance,please send mail to
If you do so,please include this problem report.You can
delete your own text from the attached returned message.
The Postfix program
:permission denied.Command output:maildrop:
maildir over quota.maildrop:maildir over quota.
那为什么会发不出去，只包含一张图片，并没有病毒