Bill, thank you for the fast reply.
Actually, I'm using outlook 2003 trying to get mail from Zimbra.
I have the simplest configuration: Zimbra and outlook client in the same network segment - no gateways, no nat, no external accounts.
All the settings are by default except authorization. Authorization is setup to authenticate users via active directory (windows 2003 domain).
This is full log of connection attempt in mailbox.log
Code:
2010-07-15 09:19:30,701 INFO [ImapServer-5] [] imap - [192.168.1.251] connected
2010-07-15 09:19:30,740 INFO [ImapServer-5] [ip=192.168.1.251;] account - authentication failed for user (no such account)
2010-07-15 09:19:39,976 INFO [ImapServer-5] [] ProtocolHandler - Handler exiting normally
2010-07-15 09:19:54,781 INFO [Timer-Zimbra] [] SessionCache - Removed 2 idle sessions (SOAP, ADMIN). 4 active sessions remain.
2010-07-15 09:19:57,199 INFO [ImapServer-6] [] imap - [192.168.1.251] connected
2010-07-15 09:19:57,239 INFO [ImapServer-6] [ip=192.168.1.251;] account - authentication failed for user (no such account)
2010-07-15 09:20:04,235 INFO [ImapServer-6] [] ProtocolHandler - Handler exiting normally
2010-07-15 09:20:04,251 INFO [ImapServer-7] [] imap - [192.168.1.251] connected
2010-07-15 09:20:04,301 INFO [ImapServer-7] [ip=192.168.1.251;] account - authentication failed for user (no such account)
2010-07-15 09:20:14,687 INFO [ImapServer-7] [] ProtocolHandler - Handler exiting normally
2010-07-15 09:20:14,764 INFO [ImapServer-8] [] imap - [192.168.1.251] connected
2010-07-15 09:20:14,799 INFO [ImapServer-8] [ip=192.168.1.251;] account - authentication failed for user (no such account)
2010-07-15 09:20:22,681 INFO [ImapServer-8] [] ProtocolHandler - Handler exiting normally
2010-07-15 09:20:22,684 INFO [ImapServer-9] [] imap - [192.168.1.251] connected
2010-07-15 09:20:22,719 INFO [ImapServer-9] [ip=192.168.1.251;] account - authentication failed for user (no such account)
2010-07-15 09:20:33,009 INFO [ImapServer-9] [] ProtocolHandler - Handler exiting normally