[dspam-users] messages to spam alias are not processed by dspam

When I try to send email to the dspam filter alias - ie
spam-dspam_test@domain.com it is not processed by dspam.

Is it likely to something within postfix that bypasses mail sent from
the server itself?

I am using webmail to test it.

/vfclists

!DSPAM:1011,485d8476150926962716922!
Received on Sat Jun 21 22:45:12 2008