1#! /bin/sh
2
3HOSTNAME=$(/bin/hostname)
4
5if [ -z "$HOSTNAME" -o "$HOSTNAME" = "(none)" -o ! -z "`echo $HOSTNAME | sed -n '/^[0-9]*\.[0-9].*/p'`" ]; then
6	# If hostname is invalid, and myhostname not existed in main.cf
7	/usr/sbin/postconf -h "myhostname" 2>/dev/null
8	if [ $? -ne 0 ]; then
9		# Set "localhost" to main.cf
10		/usr/sbin/postconf -e "myhostname=localhost"
11	fi
12fi
13
14