Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
http://www.zimbra.com/forums/installation/61938-ironmaiden-8-0-3-ported-freebsd.html
Running an email server (let alone full-blown groupware) on a router is not a good idea from both security and administrative perspectives.