My company just migrate to Exchange 2007, and luckily they enable IMAP. To access it, somehow I need to specify the IP address instead of the server name. And it works! I used disconnected IMAP in Kmail. The other parameters are left as default.
For sending, I use smtp, and then in the Security Tab, set the Encryption as “TLS”, and “Authentication method” as LOGIN. I also set the user name and the password.
I managed to send email with this configuration. Wonderful!