[Dovecot] Customization of "Rejected" message.

Helo,

I'm using Dovecot 2.1.1 with Postfix 2.3.3. I've enabled the quota plugin, so that Dovecot LDA reject e-mails, when user's mailbox is out of space. By default, when mailbox is near quota, and someone tries to send huge message, a reply is automatically send to the sender. It's being send from postmaster named as Mail Delivery Subsystem. And here is my question: Is there some way to customize that auto-reply, so that it is not only being send to the sender but also to recipient gets some notice about failed attempt ?

I've also noticed, that this reply has attachment, which is rejected message, but it appears to be empty. Can I configure Dovecot to send back whole rejected message ?

Regards malloc4k