OpenXchange is an excellent competing product. There is more current information on their retail site: www.openexchange.com Do you mean OpenXchange (recently moved to the US from Germany - now www.openexchange.com) or the related SuSE OpenExchange (SLOX) now owned by Novell (http://www.novell.com/products/openexchange/overview.html)? Neither of them are 'free'. Both have commercial retail versions. Besides, Open Source <> Free. Ultimately, Microsoft Exchange Server 2003 still performs better, integrates into AD easier and provides the most efficient user experience (MAPI, Cached-mode, a better OWA), better mobile client services, greater adoption worldwide. But depending on the potential client's needs and resources, an alternative to Exchange Server might be a better fit. -----Original Message----- From: A. Michael Salim [mailto:msalim@xxxxxxxxxxxx] Sent: Thursday, July 21, 2005 12:04 PM To: [ExchangeList] Subject: [exchangelist] Open-Exchange http://www.MSExchange.org/ Hi all, Any comments on Open Exchange? Anyone used it? http://mirror.open-xchange.org This is an open source (i.e. free) product. I have a customer who seems very interested in it so I wanted to talk to him intelligently about MS Exchange vs Open-Exchange, technical pros and cons (not just mareting pros and cons like "MS is a big company, Open-Exchange is an unknown, no support etc."). Best regards Mike Salim ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: william@xxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx