[Dovecot] 1.1 Quota Question

Hi, I'm not sure if this question has been asked before but some googling hasn't turned up anything really relevant.

We are currently running Dovecot 1.1.16 & Postfix; maildir++.

When a message arrives for a mailbox which is over quota, it is bounced. Obviously, this isn't very desirable; the primary downside to this is that when junk mail hits a full mailbox it's bounced to that recipient of the message. On a busy mail system, that could potentially get us blacklisted pretty quickly. Ideally we would like to reject the messages inline. Is there an easy way to set this up?

Thanks, Marty