zimbra auto-reply is not working for all my users. I have successfully setup in the COS the cache days. It was working fine couple of months ago until after migrating to my production server. my zimbra release is:
Release 6.0.4_GA_2038.UBUNTU8_64 UBUNTU8_64 FOSS edition.
Please help me resolve this if you have any idea.

I have a primary and secondary server. There are few users on the primary and few on the secondary server. The users on the secondary server (zimbra server) are having the problems. Both users are using the same domain as their email ie. userold@mail.co and usernew@mail.co