Cant send mails- MTA postfix is not running

[paborra]

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]$ zmcontrol status
Host mail.tarjetamira.com.ar
antispam Running
antivirus Running
ldap Running
logger Running
mailbox Running
mta Stopped
postfix is not running
snmp Running
spell Running
stats Running

then when i went to see the zimbra.log file and shows:

Jun 16 11:24:33 mail zmmailboxdmgr[25535]: status OK
Jun 16 14:25:01 mail postfix/postqueue[25968]: fatal: Queue report unavailable - mail system is down
Jun 16 11:25:02 mail zmmailboxdmgr[26099]: status requested
Jun 16 11:25:02 mail zmmailboxdmgr[26099]: status OK
Jun 16 14:25:31 mail postfix/postqueue[26412]: fatal: Queue report unavailable - mail system is down
Jun 16 11:24:33 mail zimbramon[5209]: 5209:info: zmmtaconfig: Could't open /opt/zimbra/conf/postfix_sender_restrictions.cf: No such file or directory
Jun 16 11:25:38 mail slapd[2881]: slap_queue_csn: queing 0x450a44f0 20100616142538.418761Z#000000#000#000000
Jun 16 11:25:38 mail slapd[2881]: slap_graduate_commit_csn: removing 0x119eac60 20100616142538.418761Z#000000#000#000000
Jun 16 11:25:48 mail zimbramon[5209]: 5209:info: zmmtaconfig: Could't open /opt/zimbra/conf/postfix_sender_restrictions.cf: No such file or directory
Jun 16 11:25:49 mail zmmailboxdmgr[27756]: status requested
Jun 16 11:25:49 mail zmmailboxdmgr[27756]: status OK
Jun 16 11:25:49 mail zmmailboxdmgr[27831]: status requested
Jun 16 11:25:49 mail zmmailboxdmgr[27831]: status OK
Jun 16 14:26:01 mail postfix/postqueue[27945]: fatal: Queue report unavailable - mail system is down
Jun 16 11:26:04 mail zmmailboxdmgr[28324]: status requested
Jun 16 11:26:04 mail zmmailboxdmgr[28324]: status OK
Jun 16 14:26:31 mail postfix/postqueue[28605]: fatal: Queue report unavailable - mail system is down

I dont know why postfix is not running

[paborra]

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
Jun 16 10:39:40 mail postfix/postfix-script[10210]: warning: not owned by root: /opt/zimbra/data/postfix/spool
Jun 16 10:39:40 mail postfix/postfix-script[10218]: warning: not owned by root: /opt/zimbra/postfix-2.6.5.2z/conf/main.cf
Jun 16 10:39:40 mail postfix/postfix-script[10219]: warning: not owned by root: /opt/zimbra/postfix-2.6.5.2z/conf/master.cf
Jun 16 10:39:40 mail postfix/postfix-script[10220]: warning: not owned by root: /opt/zimbra/postfix-2.6.5.2z/conf/master.cf.in
Jun 16 10:39:40 mail postfix/postfix-script[10223]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/inet.smtp
Jun 16 10:39:40 mail postfix/postfix-script[10224]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.showq
Jun 16 10:39:40 mail postfix/postfix-script[10225]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.error
Jun 16 10:39:40 mail postfix/postfix-script[10226]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.defer
Jun 16 10:39:40 mail postfix/postfix-script[10227]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.smtp-amavis
Jun 16 10:39:40 mail postfix/postfix-script[10228]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.smtp
Jun 16 10:39:40 mail postfix/postfix-script[10229]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.trace
Jun 16 10:39:40 mail postfix/postfix-script[10230]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.bounce
Jun 16 10:39:40 mail postfix/postfix-script[10231]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.cleanup
Jun 16 10:39:40 mail postfix/postfix-script[10232]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.retry
Jun 16 10:39:40 mail postfix/postfix-script[10234]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/inet.465
Jun 16 10:39:40 mail postfix/postfix-script[10235]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/master.pid
Jun 16 10:39:40 mail postfix/postfix-script[10236]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/inet.127.0.0.1:10025
Jun 16 10:39:40 mail postfix/postfix-script[10237]: warning: not owned by postfix: /opt/zimbra/data/postfix/./spool/pid/unix.lmtp
Jun 16 10:39:40 mail postfix/postfix-script[10249]: starting the Postfix mail system
Jun 16 10:39:40 mail postfix/master[10250]: fatal: bind 0.0.0.0 port 25: Address already in use

[phoenix]

Originally Posted by paborra

Jun 16 10:39:40 mail postfix/master[10250]: fatal: bind 0.0.0.0 port 25: Address already in use

That's the problem. Stop whatever mail server is running and disable it from starting on boot the restart Zimbra.