srry it was in my orig post. 2.4.37
You definitely should upgrade to 2.4.39. There have been significant fixes to mdb since 2.4.37. You should also reload your mdb db after doing so to reset the DB size.
--Quanah -- Quanah Gibson-Mount Server Architect Zimbra, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration