David Glass thinks this is interesting: identify From 2. Prerequisites from Postfix: The Definitive Guide by Kyle D. Dent Publisher: O'Reilly Media, Inc. Released: December 2003 Note identity Share this highlight http://www.safaribooksonline.com/a/postfix-the-definitive/8781728/ Twitter Facebook Google Plus Email Get Instant Access Now Start a Free Trial Learn about Safari for Business Have an account? Sign in. Minimise Unlock the rest of Postfix: The Definitive Guide and 30,000 other books and videos By clicking this box, you confirm that you have read and agree to the terms and conditions of our Membership Agreement, and you understand that when your trial period ends, you will be required to provide billing information if you wish to continue using the service. Unlock the rest of this book Start a Free 10-Day Trial loading Learn about Safari for Business Have an account? Sign in.