谁帮我正确的翻译下这段This is the Postfix program at host mx04.263xmail

谁帮我正确的翻译下这段
This is the Postfix program at host mx04.263xmail.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
: host 127.0.0.1[127.0.0.1] said: 550
master@liugong.com:mailbox limit exceeded (in reply to end of DATA command)