SMFIR_QUARANTINE : quarantine emails

[iGaurav4]

How to quarantine emails using postfix?
I have added in JilterStatus as below, and used this function in InfoMilterHandler "eom" function after spam logic.
public static final JilterStatus SMFIS_QUARANTINE = new SimpleJilterStatus(JilterConstants.SMFIR_QUARANTINE);

The emails are getting quarantine, but we are unable to fetch the email, while postfix is retrying to send that particular mail.

My issue is : -
How can we hold control over the quarantine email?
Where could we fetch it, modify it.

Could you please help ?