Depending on how you use your system, you might want
to prevent users from accessing e-mail through SMTP and POP servers. You can
prevent e-mail access entirely or allow access occasionally.
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.
Prevent Post Office Protocol access
If you do not want anyone to use Post Office Protocol (POP) to
access your iSeries™ server,
you should prevent the POP server from running.