scorpio, sorry to ask the obvious, but did you follow all of the steps to set up your quarantine database?  Did you follow steps 1-3 in the Settings->Quarantine DB tab?  If so, did you get a success or error message?
Apart from that, go to the Settings->Configuration tab and make sure that you do not have any "tag spam..." check-boxes on... they will forward spam to the users and bypass the quarantine.

As for viewing emails as html, you're right, that file isn't in there.  My guess for the reason why is that it's a bit complicated:
Robert would need to write function that would properly parse the various mime sections of the message, and display the html.  On top of this, embeded or linked images, javascript, and stylesheets from the message within your users' browsers poses a security risk - and it can inadvertantly notify the spammer that the message was successfully delivered.  For those reasons, it may be up to you in order to script a page to display html email as you see fit.

sgeorge,

Thank you very much for your reply.

I'm quit sure that I have correctly configured the Quarantine DB and it can collect Spam data for me. (and I can create the login for web interface, but I just cannot get the password via email and I just use access to open the .mdb file to get it back)

Roberto,

Thank you for your reply too.

um..I've make sure that I have configured on the router for incoming port 25 forward to that machine's port 25 for SpamFilter, and my mail server is installed on the same machine listening port 26 for the incoming email (forwarded by SpamFilter).

I can receive some email, but I just cannot connect to the server via telnet command though internet (I can use telnet to connect when I'm using local machine or another machine in the same network). Do you have any idea? or it is okay even I cannot connect by telnet?

Thank you for the update, I'll have a try on the web interface.