Problems with spam and virus filters in virtualmin

One this worth noting is that the procmail configuration you have there is not compatible with Virtualmin. It's the basic spam filtering config generated by the Webmin SpamAssassin module...Virtualmin mail processing is more complex and capable (it also does virus and per-user stuff). A Virtualmin procmailrc looks like this:

LOGFILE=/var/log/procmail.log
TRAP=/etc/webmin/virtual-server/procmail-logger.pl
:0wi
VIRTUALMIN=|/etc/webmin/virtual-server/lookup-domain.pl $LOGNAME
:0
* ?/usr/bin/test "$VIRTUALMIN" != ""
{
INCLUDERC=/etc/webmin/virtual-server/procmail/$VIRTUALMIN
}
ORGMAIL=$HOME/Maildir/
DEFAULT=$HOME/Maildir/
DROPPRIVS=yes
:0
$DEFAULT

The other thing worth noting is that you're talking past the problem when you say, "Failed to save enabled features : The Procmail program needed for spam filtering does not appear to be installed on your system, or has not yet been set up properly in Webmin's Procmail Mail Filter module." and then follow up with "Even that procmail is allready setup like this:" The fact that procmail has configuration is not an "even" that makes sense in this context. You and Webmin aren't arguing with each other--it's saying one thing, and you answer with something completely unrelated. ;-)

The error is saying that the Webmin Procmail module does not know where your procmail binary is. That's a little strange, as procmail hasn't gone anywhere in Fedora 9--it's the same as it's been for years, so it ought to default to the right thing. This could be indicative of a Webmin install problem--like maybe it didn't detect the OS correctly, or it could be something you changed in the Procmail module that caused it to be confused.

So, browse to Webmin:Servers:Procmail Mail Filter and check the Module Config to be sure the paths are correct. Get that working, and this particular error will go away--you'll get another about the procmailrc containing incompatible configuration, which you'll need to fix by replacing it with the Virtualmin settings instead of the simpler Webmin settings.