Reference:
Bug 26395 - quickly goto date (always good to post back here so people can find it easier)
Welcome to the forums though! Just to orient you a bit:
Bugs & RFE's (requests for enhancements) can be filed/voted for in
Bugzilla & tracked (see priorities & what release their going into) via
PMweb.
As you're an NE customer you can also add a 'tagged support ticket' extra vote; see your system admin if you're in-fact an end-user & want this done.
A good doc to checkout is:
Open Source Product Management: How do features get into Zimbra?
Last but definitely not least - the
Wiki has all sorts of collective knowledge in it
