Disk Quota & Qmail

[Shashi Dahal]

Dear All,
        
        I have Redhat 5.2 with Qmail. I have enabled quota and it works fine,
except for the fact that mail send to the user doesn't bounce back to the
sender. The user also doesn't get the mail as Qmail just records "
Temporary Deferral in Maildir Delivery" in its log. Can you please point to
me on how can I use disk quota with qmail ? 
Another question is what is practically good ? use disk quota or force
databytes ?

Please guide.

TIA

Shashi