title: Cannot connect to SMTP server
body: <p>Hello I have problems sending emails from my Outlook using my server SMTP how ever if I send the emails from php all whent OK. From Outlook I get this message...</p>
  
  <p>421 Cannot connect to SMTP server 74.208.230.18</p>
  
  <p>But server IP and port 25 are open</p>
  
  <p>Any ideas ??
      [root@mipagina ~]# postfix status
      postfix/postfix-script: the Postfix mail system is running: PID: 15758</p>
  
  <pre><code>[root@mipagina ~]# netstat -tulpn|grep 25
  tcp        0      0 0.0.0.0:25                  0.0.0.0:*                   LISTEN      15758/master
  tcp        0      0 :::25                       :::*                        LISTEN      15758/master
  </code></pre>