Content-Type: text/plain; format=flowed
Subject: I have received your mail
From: "Mail Daemon"<postmaster@system>

Hi,
  Thank you for sending me the mail. I have received it!(this is an auto-response)

Below is the original mail information:
   Time:    <time>
   From:    <from>
   To:      <rcpt>
   Subject: <subject>
   Parts:   <parts>
   Length:  <length>

