Hi.This is the qmail-send program at yahoo.com.这句话怎么解释

Hi.This is the qmail-send program at yahoo.com.这句话怎么解释
关于翻译
Hi.This is the qmail-send program at yahoo.com.

I'm afraid I wasn't able to deliver your message to the following

addresses.

This is a permanent error; I've given up.Sorry it didn't work out.
Received:(qmail 8904 invoked by uid 60001); 21 May 2007 07:51:03 -0000
DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws;
s=s1024; d=yahoo.com.cn;
h=X-YMail-OSG:Received:Date:From:To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID;
b=cr6I6/veEdEq/pTMM7C6LlSxvaUTB35otg+Z5htr23zzBHVJGpPX2ysrmL6Ykd215GqJU6OQxq5dbaW31+ksJx7PgJ8B8i3aYzD0XOwkb1hJsKv4YtxC6efvvUYE++k0O8HR6NrLxevgfZsPbtfYxoK2r3925PoDOdsQ0wZUv2g=;
X-YMail-OSG:
tNkqMuQVM1kUQpIf.qmhN.iDUUvdpkDWR6FMFwcwEsBHYhttmP6s.RMcvDAIG_VbJA7ET1oZIBJAo8fJuXHqvNNZ738Y_2Y5spbc
Received:from [121.35.71.138] by web15013.mail.cnb.yahoo.com via HTTP;
Mon,21 May 2007 15:51:03 CST
Date:Mon,21 May 2007 15:51:03 +0800 (CST)