title: Should I see email on port 25 with netcat?
body: <p>Assuming I have a domain forwarded properly to a box (i.e., I can see a webpage on the box from the outside world) If I use netcat to listen on some ports from a ssh session:</p>
  
  <pre><code>nc -l 587
  
  nc -l 25
  </code></pre>
  
  <p>and send mail to the server user@mydomain.com</p>
  
  <p>I should see the beginning of the handshake in the send attempts? I know my ISP does not block port 25 because I can see a browser header with netcat if I go to <a href="http://mydomain.com:25" rel="nofollow">http://mydomain.com:25</a></p>