Hello guys,

I upgraded to the latest zimbra (4.0.3) and the server is going down randomly. This are the messages i'm getting on zimbra.log

Code:
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: antispam: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: antivirus: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: ldap: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: logger: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: mailbox: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: mta: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: snmp: Running 
Nov  2 09:00:13 studio zimbramon[13456]: 13456:info: 2006-11-02 09:00:01, STATUS: onelx.com: spell: Running 
Nov  2 09:01:25 studio amavis[25748]: Net::Server: 2006/11/02-09:01:25 Server closing!
Nov  2 09:01:28 studio clamd[25779]: Pid file removed. 
Nov  2 09:01:28 studio clamd[25779]: Exiting (clean) 
Nov  2 09:01:28 studio clamd[25779]: --- Stopped at Thu Nov  2 09:01:28 2006 
Nov  2 09:01:29 studio postfix/postfix-script: stopping the Postfix mail system
Nov  2 09:01:29 studio postfix/master[25798]: terminating on signal 15
Nov  2 09:01:29 studio zmtomcatmgr[14146]: threaddump requested
Nov  2 09:01:29 studio zmtomcatmgr[25450]: sending SIQUIT to tomcat/JVM process 25451
Nov  2 09:01:31 studio zmtomcatmgr[14153]: stop requested
Nov  2 09:01:31 studio zmtomcatmgr[14153]: waiting for manager process 25450 to die
Nov  2 09:01:31 studio zmtomcatmgr[25450]: shutdown requested, sending TERM signal to 25451
Nov  2 09:01:34 studio zmtomcatmgr[25450]: tomcat/JVM process exited (waitpid expected 25451 got 25451)
Nov  2 09:01:34 studio zmtomcatmgr[25450]: manager woke up from wait on tomcat/JVM with pid 25451
Nov  2 09:01:35 studio zmtomcatmgr[14153]: manager process 25450 died, shutdown completed
Nov  2 09:02:08 studio zmtomcatmgr[14315]: status requested
Nov  2 09:02:08 studio zmtomcatmgr[14315]: file /opt/zimbra/log/zmtomcatmgr.pid does not exist
Nov  2 09:02:08 studio zmtomcatmgr[14315]: assuming no other instance is running
Nov  2 09:02:08 studio zmtomcatmgr[14315]: no manager process is running
Nov  2 14:02:08 studio postfix/postqueue[14325]: fatal: Queue report unavailable - mail system is down
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: antispam: Stopped 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: antivirus: Stopped 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: ldap: Running 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: logger: Running 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: mailbox: Stopped 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: mta: Stopped 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: snmp: Running 
Nov  2 09:02:09 studio zimbramon[14160]: 14160:info: 2006-11-02 09:02:02, STATUS: onelx.com: spell: Running 
Nov  2 09:03:25 studio amavis[14582]: starting.  /opt/zimbra/amavisd/sbin/amavisd at onelx.com amavisd-new-2.4.1 (20060508), Unicode aware, LANG=es_PE.UTF-8
Nov  2 09:03:25 studio amavis[14582]: user=500, EUID: 500 (500);  group=, EGID: 500 501 500 5 (500 501 500 5); log_level=1
Nov  2 09:03:25 studio amavis[14582]: Perl version               5.008005
Nov  2 09:03:26 studio amavis[14582]: SpamControl: init_pre_chroot done
Nov  2 09:03:26 studio amavis[14583]: Net::Server: Process Backgrounded
Nov  2 09:03:26 studio amavis[14583]: Net::Server: 2006/11/02-09:03:26 Amavis (type Net::Server::PreForkSimple) starting! pid(14583)
Nov  2 09:03:26 studio amavis[14583]: Net::Server: Binding to UNIX socket file /opt/zimbra/amavisd/amavisd.sock using SOCK_STREAM
Nov  2 09:03:26 studio amavis[14583]: Net::Server: Binding to TCP port 10024 on host 127.0.0.1
Nov  2 09:03:26 studio amavis[14583]: Net::Server: Group Not Defined.  Defaulting to EGID '500 501 500 5'
Nov  2 09:03:26 studio amavis[14583]: Net::Server: User Not Defined.  Defaulting to EUID '500'
Nov  2 09:03:26 studio amavis[14583]: Module Amavis::Conf        2.065
Nov  2 09:03:26 studio amavis[14583]: Module Archive::Tar        1.29
Nov  2 09:03:26 studio amavis[14583]: Module Archive::Zip        1.16
Nov  2 09:03:26 studio amavis[14583]: Module BerkeleyDB          0.28
Nov  2 09:03:26 studio amavis[14583]: Module Compress::Zlib      1.41
Nov  2 09:03:26 studio amavis[14583]: Module Convert::TNEF       0.17
Nov  2 09:03:26 studio amavis[14583]: Module Convert::UUlib      1.06
Nov  2 09:03:26 studio amavis[14583]: Module DBD::mysql          3.0006
Nov  2 09:03:26 studio amavis[14583]: Module DBI                 1.51
Nov  2 09:03:26 studio amavis[14583]: Module DB_File             1.814
Nov  2 09:03:26 studio amavis[14583]: Module Digest::MD5         2.33
Nov  2 09:03:26 studio amavis[14583]: Module MIME::Entity        5.420
Nov  2 09:03:26 studio amavis[14583]: Module MIME::Parser        5.420
Nov  2 09:03:26 studio amavis[14583]: Module MIME::Tools         5.420
Nov  2 09:03:26 studio amavis[14583]: Module Mail::Header        1.74
Nov  2 09:03:26 studio amavis[14583]: Module Mail::Internet      1.74
Nov  2 09:03:26 studio amavis[14583]: Module Mail::SpamAssassin  3.001003
Nov  2 09:03:26 studio amavis[14583]: Module Net::Cmd            2.26
Nov  2 09:03:26 studio amavis[14583]: Module Net::DNS            0.57
Nov  2 09:03:26 studio amavis[14583]: Module Net::LDAP           0.33
Nov  2 09:03:26 studio amavis[14583]: Module Net::SMTP           2.29
Nov  2 09:03:26 studio amavis[14583]: Module Net::Server         0.93
Nov  2 09:03:26 studio amavis[14583]: Module Time::HiRes         1.87
Nov  2 09:03:26 studio amavis[14583]: Module Unix::Syslog        0.99
Nov  2 09:03:26 studio amavis[14583]: Amavis::DB code      loaded
Nov  2 09:03:26 studio amavis[14583]: Amavis::Cache code   loaded
Nov  2 09:03:26 studio amavis[14583]: SQL base code        NOT loaded
Nov  2 09:03:26 studio amavis[14583]: SQL::Log code        NOT loaded
Nov  2 09:03:26 studio amavis[14583]: SQL::Quarantine      NOT loaded
Nov  2 09:03:26 studio amavis[14583]: Lookup::SQL code     NOT loaded
Nov  2 09:03:26 studio amavis[14583]: Lookup::LDAP code    loaded
Nov  2 09:03:26 studio amavis[14583]: AM.PDP-in proto code loaded
Nov  2 09:03:26 studio amavis[14583]: SMTP-in proto code   loaded
Nov  2 09:03:26 studio amavis[14583]: Courier proto code   NOT loaded
Nov  2 09:03:26 studio amavis[14583]: SMTP-out proto code  loaded
Nov  2 09:03:26 studio amavis[14583]: Pipe-out proto code  NOT loaded
Nov  2 09:03:26 studio amavis[14583]: BSMTP-out proto code NOT loaded
Nov  2 09:03:26 studio amavis[14583]: Local-out proto code loaded
Nov  2 09:03:26 studio amavis[14583]: OS_Fingerprint code  NOT loaded
Nov  2 09:03:26 studio amavis[14583]: ANTI-VIRUS code      loaded
Nov  2 09:03:26 studio amavis[14583]: ANTI-SPAM code       loaded
Nov  2 09:03:26 studio amavis[14583]: ANTI-SPAM-SA code    loaded
Nov  2 09:03:26 studio amavis[14583]: Unpackers code       loaded
Nov  2 09:03:26 studio amavis[14583]: Found $file            at /usr/bin/file
Nov  2 09:03:26 studio amavis[14583]: Found $dspam           at /opt/zimbra/dspam/bin/dspam
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .mail
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .asc 
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .uue 
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .hqx 
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .ync 
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .F    tried: unfreeze, freeze -d, melt, fcat
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .Z    at /usr/bin/gzip -d
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .gz  
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .bz2  at /usr/bin/bzip2 -d
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .lzo  tried: lzop -d
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .rpm  at /usr/bin/rpm2cpio
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .cpio at /usr/bin/pax
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .tar  at /usr/bin/pax
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .deb  at /usr/bin/ar
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .zip 
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .rar  tried: rar, unrar
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .arj  tried: arj, unarj
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .arc  tried: nomarch, arc
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .zoo  tried: zoo
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .lha  at /usr/bin/lha
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .cab  tried: cabextract
Nov  2 09:03:26 studio amavis[14583]: No decoder for       .tnef tried: tnef
Nov  2 09:03:26 studio amavis[14583]: Internal decoder for .tnef
Nov  2 09:03:26 studio amavis[14583]: Found decoder for    .exe  at /usr/bin/lha
Nov  2 09:03:26 studio amavis[14583]: Using internal av scanner code for (primary) ClamAV-clamd
Nov  2 09:03:26 studio clamd[14631]: Daemon started. 
Nov  2 09:03:26 studio clamd[14631]: clamd daemon 0.88.4 (OS: linux-gnu, ARCH: i386, CPU: i686) 
Nov  2 09:03:26 studio clamd[14631]: Log file size limited to 20971520 bytes. 
Nov  2 09:03:27 studio amavis[14583]: Creating db in /opt/zimbra/amavisd/db/; BerkeleyDB 0.28, libdb 4.2
Nov  2 09:03:27 studio clamd[14631]: Reading databases from /opt/zimbra/clamav/db 
Nov  2 09:03:27 studio amavis[14583]: SpamControl: initializing Mail::SpamAssassin
Nov  2 09:03:28 studio postfix/postfix-script: fatal: the Postfix mail system is not running
Nov  2 09:03:28 studio zmtomcatmgr[14737]: threaddump requested
Nov  2 09:03:28 studio zmtomcatmgr[14737]: file /opt/zimbra/log/zmtomcatmgr.pid does not exist
Nov  2 09:03:28 studio zmtomcatmgr[14737]: assuming no other instance is running
Nov  2 09:03:28 studio zmtomcatmgr[14737]: no manager process is running
Nov  2 09:03:29 studio clamd[14631]: Protecting against 75255 viruses. 
Nov  2 09:03:29 studio amavis[14583]: SpamControl: init_pre_fork done
Nov  2 09:03:30 studio zmtomcatmgr[14755]: stop requested
Nov  2 09:03:30 studio zmtomcatmgr[14755]: file /opt/zimbra/log/zmtomcatmgr.pid does not exist
Nov  2 09:03:30 studio zmtomcatmgr[14755]: assuming no other instance is running
Nov  2 09:03:30 studio zmtomcatmgr[14755]: no manager process is running
Nov  2 09:04:13 studio zmtomcatmgr[14912]: status requested
Nov  2 09:04:13 studio zmtomcatmgr[14912]: file /opt/zimbra/log/zmtomcatmgr.pid does not exist
Nov  2 09:04:13 studio zmtomcatmgr[14912]: assuming no other instance is running
Nov  2 09:04:13 studio zmtomcatmgr[14912]: no manager process is running
Hope you guys can help.

Thanks,
Fernando