Instant Capacity on Demand (iCOD) User's Guide for versions B.05.x

Understanding iCOD Requirements
E-Mail Requirements
Chapter 230
Configuring Your Server to Send but Not Receive
E-Mail
For security reasons, some organizations do not wish to allow incoming
mail. If you want your iCOD system to be capable of only sending e-mail,
and not receiving e-mail, complete the following configuration procedure:
Step 1. To prevent the sendmail daemon from starting up again when your
system reboots, edit the /etc/rc.config.d/mailservs file, changing
the value of SENDMAIL_SERVER to 0:
vi /etc/rc.config.d/mailservs
#########################################
# Mail configuration. See sendmail(1m) #
#########################################
#
# BSD’s popular message handling system
#
# SENDMAIL_SERVER: Set to 1 if this is a mail server
# and should run the sendmail deamon.
# SENDMAIL_SERVER_NAME: If this is not a mail server, but a
# client being served by another
# system, then set this variable to
# the name of the mail server system
# name so that site hiding can be
# performed.
#
export SENDMAIL_SERVER=0
export SENDMAIL_SERVER_NAME=
Step 2. To immediately stop the server from receiving e-mail, kill the active
sendmail daemon by executing the following command:
/sbin/init.d/sendmail stop