THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The easiest way to integrate postfix and spamassassin is to use spamd. First, edit /etc/postfix/master.cf, find the " smtp ... smtpd " line and just add " -o content_filter=spamassassin" to the end of the line.
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spamassassin unix - n n - - pipe user=nobody argv=/path/to/spamc -f -e /path/to/postfix/sendmail -oi -f ${sender} ${recipient}
# make sure it's all on one line or
# start the second line with a whitespace
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