I use zimbra version
Release 5.0.13_GA_2791.RHEL5_64_20090206123226 CentOS5_64 FOSS edition
last version I can edit file master.cf but this version when I update this file
and restart posfix this file will turn back like I don't edit anythig.
I want to know how I can edit file master.cf.
thank you for reply.