off spamassassin

Hi folks,

I have a server 2.0.16 running on BSD system.
There are 100 users and some of them are receiving spam.
I decided to install spamassassin.
I folowed the steps below:

1.perl -MCPAN -e 'install Mail::SpamAssassin'"

2. As root, create a file at /usr/local/bin/spamfilter.sh with the following
content:
#!/bin/bash
/usr/local/bin/spamc | /usr/sbin/sendmail -i "$@"
exit $?

3. Run "chmod 755 /usr/local/bin/spamfilter"

4. Create a user called 'spamfilter'. Make it a complete user, with home
directory and shell.

5. Run "chown spamfilter /usr/local/bin/spamfilter"

6. In /etc/postfix/master.cf in the "Services" section, alter the 'smtp'
line as follows (the " -o con..." SHOULD be on the next line: NOTE: there
are two lines that have smtp. Make sure it is the inet line. Usually the
first line.
# --------------------------------------------------------------------------
---------
smtp inet n - n - - smtpd
-o content_filter=spamfilter:
# --------------------------------------------------------------------------
---------

7. In /etc/postfix/master.cf in the "Interfaces to non-Postfix software"
section add:
# --------------------------------------------------------------------------
---------
spamfilter unix - n n - - pipe
flags=Rq user=spamfilter argv=/usr/local/bin/spamfilter.sh -f ${sender} --
${recipient}
# --------------------------------------------------------------------------
---------

Re-started Postfix and run:

/usr/local/bin/spamd -a -c -d

I verified the log and see somethings like that:


Jun 15 14:01:26 b spamd[25938]: connection from localhost [127.0.0.1] at
port 3076
Jun 15 14:01:26 b spamd[25938]: connection from localhost [127.0.0.1] at
port 3076
Jun 15 14:01:26 b spamd[28857]: info: setuid to spamfilter succeeded
Jun 15 14:01:26 b spamd[28857]: info: setuid to spamfilter succeeded
Jun 15 14:01:26 b spamd[28857]: processing message
<20040615170125.F350740E56@ns> for spamfilter:30.
Jun 15 14:01:26 b spamd[28857]: processing message
<20040615170125.F350740E56@ns> for spamfilter:30.
Jun 15 14:01:26 b spamd[28857]: clean message (0.0/5.0) for spamfilter:30 in
0.1 seconds, 4389 bytes.
Jun 15 14:01:26 b spamd[28857]: clean message (0.0/5.0) for spamfilter:30 in
0.1 seconds, 4389 bytes.
Jun 15 14:01:26 bh postfix/pipe[28620]: F350740E56: to=<bcc@>,
relay=spamfilter, delay=1, status=sent (ns)
Jun 15 14:01:26 bh postfix/pipe[28620]: F350740E56: to=<bcc@>,
relay=spamfilter, delay=1, status=sent (ns)

But the users continue receiving spam, Could you help me?
Thanks and regards.
Eicke.