[SOLVED] How I can edit file master.cf

[ohm_g7]

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.

[uxbod]

Do you have a master.cf.in ?

[ohm_g7]

yes I have.
I can edit in this file?

[uxbod]

Indeed master.cf is written from the values in the master.cf.in when the services are restarted; plus values from your ZCS LDAP aswell.

[ohm_g7]

Thank you.