title: Why does Amazon EC2 limit port 25?
body: <p>It says <a href="http://docs.aws.amazon.com/ses/latest/DeveloperGuide/smtp-issues.html" rel="noreferrer">here</a>...</p>
  
  <blockquote>
    <p>Amazon EC2 imposes default sending limits on email sent via port 25
    and throttles outbound connections if you attempt to exceed those
    limits. To remove these limits, submit a Request to Remove Email
    Sending Limitations. You can also connect to Amazon SES via port 465
    or port 587, neither of which is throttled.</p>
  </blockquote>
  
  <p>Why doesn't it throttle ports 465 and 587? Why doesn't everyone use these ports instead of 25 and avoid the throttling issue altogether?</p>