Prevent Simple Mail Transfer Protocol access

If you do not want anyone to use Simple Mail Transfer Protocol (SMTP) to distribute mail to or from your iSeries™ server, you should prevent the SMTP server from running.

SMTP is configured by default to start automatically when TCP/IP starts. If you do not plan to use SMTP at all, do not configure it on your iSeries server (or allow anyone else to configure it).

• Prevent Simple Mail Transfer Protocol from starting when TCP/IP starts
  You might need to use Simple Mail Transfer Protocol (SMTP) occasionally, but want to limit the amount of access users have the SMTP server.
• Prevent access to Simple Mail Transfer Protocol ports
  To secure your Simple Mail Transfer Protocol (SMTP) server from unknown applications, you might want to prevent access to SMTP ports.
• Hold Systems Network Architecture Distribution Services queues
  You can hold Systems Network Architecture Distribution Services (SNADS) distribution queues, which the SMTP application uses to distribute e-mail. This will provide you with extra protection to limit distribution of e-mail.