Can't connect to any SMTP server

[COD]

Trying to install Zimbra to replace Outlook on my work machine.

1. test Yahoo account works fine.
2. Gmail account works fine.
3. Exchange account - can't connect to any SMTP server.

I currently use Outlook 2007 as a IMAP client back to Exchange. I also have Thunderbird installed and it too can send email through my employers SMTP server. The set up that works is very simple - port 25 - no authentication as my employer whitelists IP addresses that can use the SMTP server. I can send emails from both Thunderbird and Outlook - but I can't set up the account in Zimbra because the validation fails on the SMTP check with this error message. I tried it as both Exchange IMAP and a generic IMAP account.

Cannot connect to "SMTP server". Please check host/port and network connectivity.

I've tried two different SMTP servers that I verified as working with a test email from Thunderbird. Neither will pass the verification test in Zimbra.

Any ideas?

(This is Win XP - Zimbra zdesktop_1_0_build_1537_win32)

[Ramadan Mansoura]

Can you enable smtp debug and send the
<install>/zimbra/zdesktop/log/zdesktop.out
Edit this file <install>/zimbra/zdesktop/conf/localconfig.xml
change this code

 <key name="javamail_smtp_debug">
    <value>false</value>
  </key> 
  

to

 <key name="javamail_smtp_debug">
    <value>true</value>
  </key> 
  

save the file and restart zdesktop
<install>/zimbra/zdesktop/zdesktop stop
<install>/zimbra/zdesktop/zdesktop start

[COD]

ERROR: Unknown condition: Settings\codonnell.GYES\Local
ERROR: Unknown condition: Settings\Application
ERROR: Unknown condition: Data\Zimbra\zdesktop/jetty
0    INFO  [main] log - Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
8703 INFO  [main] log - jetty-6.1.5
18109 INFO  [main] log - No Transaction manager found - if your webapp requires one, please configure one.
Zimbra server process is running as uid=-1 euid=-1 gid=-1 egid=-1
110672 INFO  [main] security - keystore not present
DEBUG: setDebug: JavaMail version 1.4.1ea-SNAPSHOT
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "hermes.unanet.com", port 25, isSSL false
DEBUG: setDebug: JavaMail version 1.4.1ea-SNAPSHOT
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "hermes.unanet.com", port 25, isSSL false