+
+ # Check to see if someone put an IP address in a hostname
+ # field. The motivation for this was MX records where many
+ # people expect an IP address to be a valid response, but I
+ # see no harm in enforcing it elsewhere.
+ return 1011 if $s =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\.?$/;
+