title: Process an incoming mail
body: <p>I have an email account provided my web hosting service (1and1.fr).
  I would like to do a filter that automatically filters my incoming emails (24/7) :</p>
  
  <pre><code>IF (SUBJECT=="MySubject1") THEN 
  { 
    SEND A NEW EMAIL to the sender with subject="Bonjour", text="Lorem Ipsum...."
  }
  </code></pre>
  
  <p>What service / language / tool to use in order to do this ?</p>
  
  <p>Online service?</p>
  
  <p>(PS: the features provided by the webmail don't provide such advanced "filters")</p>
  
  <p>Thanks in advance</p>