@ in a BIND zone file refers to the domain defined at the top of the file. It's been awhile since I've written one, so go look at Wikipedia: http://en.wikiped

@ in a BIND zone file refers to the domain defined at the top of the file. It's been awhile since I've written one, so go look at Wikipedia: http://en.wikipedia.org/wiki/Zone_file http://en.wikipedia.org/wiki/Zone_file