Open-source collaboration toolset Open-Xchange Server 5, which until now was available only on Novell's Suse Linux Enterprise Server, is now supported on Red Hat Enterprise Server 4, the company announced on Thursday.
Red Hat already offers a number of open-source e-mail products with its enterprise version of Linux, including the Cyrus e-mail server and the SpamAssassin spam filter.
Open-Xchange Server offers additional features including calendaring, contacts and a connector to the Microsoft Outlook e-mail client, allowing companies to migrate from Microsoft Exchange to Open-Xchange without needing to change their e-mail client.
Netline, the company, said in April that it plans to provide commercial support for its product on Mac OS X and Solaris later this year.
Ingrid Marson of ZDNet UK reported from London.