title: How can I send a file, for example "exe", with Telnet?
body: <p>With smtp, i know the commands: "HELO", "MAIL FROM", "RCPT TO", "QUIT", but i don't know how can i attach one file. Anyone can help me ? </p>
  
  <pre><code>   telnet smtp.xxxx.xxxx 25 
  helo xxxx.xxxx 
  mail from: yyy@xxx.xxx 
  rcpt to: yy2@xxx.xxx 
  data 
  subject: hi 
  hello 
  . 
  
  quit
  </code></pre>