How to customize reports

[Muhammad Farooq Bhatti]

Hi ,   I am using spamassassin with sendmail and spamassassin-milter. I want to know how I can customize the message rapports which can be sent to the sender of the spam generator.   I am getting the following error:   “reason: 550 5.7.1 Blocked by SpamAssassin.   even if email was rejected due to email box quota full. How can I customize the spamassassin to give the disk quota full error instead of just blocking message error?   Plz. Help me how can these kind of reporting be control in spamassassin.   Thanks in advance.   Muhammad Farooq Bhatti