auto response alias

[ZenMasta]

I have a hosted zimbra account and I have set up a couple of aliases.

One of these is for a mailbox we want to phase out because there is too much spam. What I would like to do is setup an autoreply on this one alias so it says something like this box is no longer in service but you can call us or contact us by clicking here...


I don't see any way to setup an auto response in zimbra desktop.

Is this possible, if so how can I do this. Would it be accomplished through a persona? still not really clear what that is either.