HP-UX System Administrator's Guide: Configuration Management

Fully Distributed (Standalone System) Topography
When using a Fully Distributed electronic mail topography, each computer is a
standalone machine (with regard to electronic mail). Each machine is effectively its
own workgroup and is configured just like the hub computer in a Central Mail Hub
topography e-mail network.
Configuring Each System
The procedure for configuring each system in a Fully Distributed topography is:
1. Edit the file /etc/rc.config.d/mailservs:
a. Set the environment variable SENDMAIL_SERVER to 1 to indicate that this
computer will run the sendmail daemon to receive mail:
SENDMAIL_SERVER=1
b. Set the environment variable SENDMAIL_SERVER_NAME to null to indicate
that no other computer serves this one:
SENDMAIL_SERVER_NAME=
c. (Optional) 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
2. Reboot the computer to start up and properly configure the sendmail daemon.
130 Configuring Mail