Have a look at http://zimbra.com. It has an open-source version with unlimited users. I've tried both it and scalix and much prefer zimbra. Cheers. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. [Fred Kienker] Scalix has announced starting with Version 11.3, to be released mid December 2007, the number of premium users available in the Community Edition will be reduced from 25 to 10. The number of standard users will remain unlimited for now. There is new commercial licenses available starting at 20 users to fill in the gap. You can continue to use Ver. 11.2 which will remain at 25 premium users forever, but there are several serious issues in this version which will not be addressed except by updating to 11.3. In our experience the most current version of the Community Edition tends to be beta test software - YMMV. Using any version of the Community Edition in a commercial or educational environment would not be a good idea without a paid for support contract from Scalix. -----------------------------Hi Fred and others, Thanks for enlightening me. I will check zimbra or kolab as other also had suggested. If there are others still who will may share ideas, please do so. Thanks, junji aisalen.wordpress.com Linux Registered User #253162 Send instant messages to your online friends http://uk.messenger.yahoo.com