Entourage vs. Debian Courier IMAP SSL and root certificate

Hi,

I have Entourage to connect with Exchange at my company and I have a Debian IMAP server at home. To secure the connection, I enabled SSL certs, and I use port 993 for the encrypted communication. I am not very big in certificates, and all I did was followed a tutorial to install openssl and courier-imap-ssl, and opened the firewall's ports. It works like a charm, but every time I start it, Entourage asks for a certificate, and I need to install the Root certificate as my entity is not trusted.

I did it with Exchange and a 2003 server once when we used Outlook Web Access, and it was straight forward, but I am not sure how to do it on a Debian server and Openssl. Any experienced users in this field?

I already found an imapd.pem certificate, which I successfully converted to .der and even imported to keychain (Leopard), but that wasnt enough, as the root is not trusted.

Any help it appreciated,

Thanks

Ben