I've used Zimbra, which is a very popular system that does everything Exchange does and more. There's a web-based client to do everything you just mentioned, and you can download software clients to do the same if you don't like the feel of web-based apps. Zimbra is, of course, free and open source; and you can even buy support from them. Check them out.... <div class="gmail_quote">On Thu, Dec 4, 2008 at 10:33 AM, Richard Brown <<a href="mailto:rich@cregy.co.uk">rich@cregy.co.uk</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi All Does anyone know of an alternative to MS Exchange that I can run through Ubuntu please? Specifically, address and calendar sharing, passing memos, emails, etc. Thanks. -- Kind regards Rich <a href="http://www.cregy.co.uk" target="_blank">http://www.cregy.co.uk</a> Embracing what God does for you is the best thing you can do for him. Romans 12 v 1 -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div> -- _________________________________ Joshua S. Martin CONFIDENTIALITY NOTE: This e-mail message, including any attachment(s), contains information that may be confidential, protected by the attorney client or other legal privileges, and or proprietary non public information. If you are not an intended recipient of this message or an authorized assistant to an intended recipient, please notify the sender by replying to this message and then delete it from your system. Use, dissemination, distribution, or reproduction of this message and or any of its attachments (if any) by unintended recipients is not authorized and may be unlawful.