i install qmail and spamassassin on a new server, i tested the mail function and i work perfectly. The problem is that when is change the setting in tcp.smtp and scan all email with spamassassin i get a message "451 unable to exec qq (#4.3.0)". i have increace the memory limit to 50m and the problem is still the same. Any one know what can couse this error?

i am not using qmail-scanner, does spamassassin need qmail-scanner to work properly with qmail?

I will like to try other mail system but the problem is that my company only use qmail because some of the web appllication that we develop have function tied to qmail.