I'm in a huge jam with this problem. We're running Zimbra NE 7.1.3 on Ubuntu 8.04 64 bit.
Yesterday i got to the customer's site and shut down the ZCS to install a new psu, case fan and cpu fan. When it was rebooted the entire ZCS environment reverted to Dec. 2011. Including all emails. And of course since this is the NE, the back up for it also caught all the new/old dates.
/opt/zimbra is on it's own drive on a reiserfs.
What else can I look at to recover the 1 1/2 years of missing mail?