Undelivered Mail Returned to

Undelivered Mail Returned to
谁帮我翻译一下
This is the Postfix program at host mta8.263.net.
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
:message size 31975361 exceeds size limit 30720000 of
server 127.0.0.1[127.0.0.1]