On Fri, 7 Sep 2007, Jun Salen wrote: > I search from google on how to restrict user from > sending mail and I did trial and errors for three days > already but to no success. What I want to do is to > restrict some user in sending mail while some > unrestricted user will send mail to internet and > intranet. I am able to restrict outside address (i.e. > gmail, yahoo) to not send mail on restricted users but > the vice versa I can not do. It sounds like this might work for you. <http://www.arschkrebs.de/postfix/postfix_restriction_classes2.shtml> Barry