title: How to send email with different server
body: <p>with PHP, we can easily send email with current server if we have installed mail server or DirectAdmin or CPanel and so on ...</p>
  
  <p>now think the situation that we need specif server sends emails, one server should be mail server and another should be Apache + PHP ? how can I achieve that ?</p>
  
  <p>I am using ubunto for both server</p>