Trouble with Zimbra 7

[husam]

Hello All,
I just searched the forum to find an answer but nothing helped me.
I have a situation like this:
- i used zimbra 6 on debian 5, it worked properly untill the power down.
- i uninstall zimbra like it said in documantation and delete every thing.
- i installed zimbra 7 step by step from documentation.
- now zimbra starts up, but the emails cant leave the system.
ERROR: connection timed out.

Jun  2 06:40:31 Rafaelo postfix/smtp[32133]: 81AF02DBE3: to=, relay=none, delay=61714, delays=61564/0.02/150/0, dsn=4.4.1, status=deferred (connect to
 alt4.gmail-smtp-in.l.google.com[74.125.47.27]:25: Connection timed out)

*

zimbra@Rafaelo:/home/husam$ zmcontrol -v
Release 7.1.0_GA_3140.DEBIAN5_64 DEBIAN5_64 FOSS edition.
zimbra@Rafaelo:/home/husam$ zmcontrol status
Host mail.xxx.com
        antispam                Running
        antivirus               Running
        ldap                    Running
        logger                  Running
        mailbox                 Running
        mta                     Running
        snmp                    Running
        spell                   Running
        stats                   Running
        zmconfigd               Running

* dig for my domain:

zimbra@Rafaelo:/home/husam$ dig xxx.com mx

; <<>> DiG 9.5.1-P3 <<>> xxx.com mx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10793
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; QUESTION SECTION:
;xxx.com.                                IN      MX

;; ANSWER SECTION:
xxx.com.                 3600    IN      MX      10 mail.xxx.com.

;; AUTHORITY SECTION:
xxx.com.                 3600    IN      NS      dns1.xxx.com.
xxx.com.                 3600    IN      NS      dns2.xxx.com.

;; ADDITIONAL SECTION:
mail.xxx.com.            3600    IN      A       62.xxx.xxx.14
dns1.xxx.com.            3600    IN      A       62.xxx.xxx.11
dns2.xxx.com.            3600    IN      A       62.xxx.xxx.12

;; Query time: 0 msec
;; SERVER: 62.xxx.xxx.11#53(62.xxx.xxx.11)
;; WHEN: Thu Jun  2 11:04:44 2011
;; MSG SIZE  rcvd: 131

* /etc/hosts :

zimbra@Rafaelo:/home/husam$ more /etc/hosts
127.0.0.1       localhost.localdomain localhost
62.xxx.xxx.14   mail.xxx.com             mail

* /etc/resolve :

zimbra@Rafaelo:/home/husam$ more /etc/resolv.conf 
domain xxx.com
search xxx.com
nameserver 62.xxx.xxx.11

my dns server.
* DNS Enabled - is checked on Global and Server Settings.
* the mail works localy on the system. (i can send & recieve mails between accounts on server).
* i tried split-dns also with same problem.
* Any ideas please??
thanks
Any help please??