then when i went to see the postfix log shows:
Jun 16 10:39:32 mail zimbramon[8682]: 8682:info: zmmtaconfig: Could't open /opt/zimbra/conf/postfix_sender_restrictions.cf: No such file or directory...

I running zimbra 6.0.2 on a CentOS 5.3 and for 7 months ran correctly but now i have this problema,the users cant send mails ,the reason is:
running zmcontrol status shows
[zimbra@mail root]$...