clamav backport install

[Rick Weinbender <lsrwein@central-ph.k12.mo.us>]

Hi,
I recently installed clam anti-virus from the backport
at www.backports.org.
(system is debian stable running qmail)
Modified my sources.list file to point to backports.org,
then ran 'apt-get install clamav'.
The install goes fine, but it doesn't scan mail without some
additional configuring.
I don't find any specific documentation to further configure it.
*
Has anyone gone thru this backport install and lived to tell
about it?  :-)  I must be missing something? (brains perhaps)
If so, I would sure appreciate any help.

Thanks,
-Rick