I am setting up a new mail server using postfix and maildrop connected to a MySQL db. I am calling Spamassassin via maildrop using the following in /usr/local/etc/maildroprc:

if ( $SIZE < 26144 ) { exception { xfilter "/usr/bin/spamassassin --prefspath=$HOME/$DEFAULT/.spamassassin/user_prefs " } }

My goal is to somehow be able to check the value of a field in the database to determine WHETHER to call spamassassin. In other words, some of my users don't want spam filtering, and I need to figure out how to "turn it off" for them. My idea is a boolean field in the user db. Is there any way for this to work? I can't find any information on the maildrop/mysql integration, specifically the maildropmysql.config file syntax. I had to comb through multiple HOWTOs to get a working one. Is there a way to query for extra fields in that file? Alternatively does anyone know how to perform a query on a mysql db and make the results available to the maildrop filters?

I hope I am being clear enough. TIA.