英语翻译This is the mail system at host c9mailgw26.amadis.com.I'

英语翻译
This is the mail system at host c9mailgw26.amadis.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 mail system
:host fwd.nsm.ctmail.com[63.251.92.194] said:550 5.7.1
Invalid recipient:'yangfy@softage.com' (in reply to RCPT TO command)