text: 2. Select**Call Home**and then, click**Enable Notifications**(see Figure 13-45). For more 
  information, see IBM Knowledge Center. 
  
  For the correct functionality of email notifications, ask your network administrator if Simple 
  Mail Transfer Protocol (SMTP) is enabled on the management network and is not, for 
  example, blocked by firewalls. Be sure to test the accessibility to the SMTP server by using 
  the**telnet**command (port 25 for a non-secured connection, port 465 for Secure Sockets 
  Layer (SSL)-encrypted communication) using any server in the same network segment. 