# List client domains you specifically wish to white-list:
# Example:
# 	domain1.tld			OK

# List client IP address ranges you wish to black-list:
# Examples:
#	 # Ban 10.0.0.0/8:
#	 10				554 Go away!
#
#	 # Ban 172.16/16:
#	 172.16				554 Bugger off!
#
#	 # 192.168.4/24 is bad, but 192.168.4.128 is okay
#	 192.168.4.128			OK
#	 192.168.4			554 Take a hike!
123.123.123.12		OK