Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Configuring a System
Setting Up Mail Services
Chapter 3280
c. (Optionally) Set the environment variable SENDMAIL_FREEZE to 1 to
indicate that the sendmail configuration file is to be frozen. With
older computers, and in certain other circumstances, a frozen
configuration file can speed up sendmail’s performance by reducing
the time it needs to parse its configuration file.
SENDMAIL_FREEZE=1
Step 2. Reboot the computer to start up and properly configure the sendmail
daemon.
Configuring the Clients Using “Gateway Mail Hub” topography each
of the clients in a local workgroup can send e-mail to the others without
having to go through the hub. For this to be successful each of the clients
must be running its own sendmail daemon.
On each client computer:
Step 1. Edit the /etc/rc.config.d/mailservs file:
a. Set the SENDMAIL_SERVER environment variable to 1. Although you
are configuring a client computer in the workgroup, setting this
environment variable to 1 will start the sendmail daemon each time
you boot your client computer so that it can receive e-mail from other
systems in your workgroup.
SENDMAIL_SERVER=1
b. Set the SENDMAIL_SERVER_NAME environment variable to the name of
the computer that will be the gateway to the outside world. For
example, if the gateway computer was called gateway.corp.com:
SENDMAIL_SERVER_NAME="gateway.corp.com"
c. The environment variable SENDMAIL_FREEZE does not apply to clients
(which always freeze the sendmail configuration file), but it is
probably good practice to set this variable to 1 to indicate to viewers
of the /etc/rc.config.d/mailservs file that the sendmail
configuration file is being frozen for this client computer:
SENDMAIL_FREEZE=1