Check whether "mail" is a known user to dspam with a known uid. The user used for retraining tokens will changed by dspam at a later stage but first the user given at command line "--user mail" will be checked.
I ran into the same problem and studied the sources for this.
> to=<spam@wordpainter.net>, relay=local, delay=0, status=sent (delivered
to command: /usr/local/bin/dspam --user mail --class=spam --source=error)
Oct 28 17:32:47 halcyon postfix/qmgr[2735]: 0E89E51AD88: removed
Joerg Pichel
Received on Mon Oct 31 04:20:11 2005
This archive was generated by hypermail 2.1.8 : Tue Nov 01 2005 - 00:00:01 EST