We have a server where the autoinstaller was used to replace qmail with postfix. Since that time, Spam Assassin is running, according to the logs, but the flags on whether something is spam or not are never making it back to postfix or whatever piece is supposed to act on that information. For example, blacklisted addresses trigger filtering which gets logged, but the email goes right to the inbox and there are no SpamAssassin headers added to it, as if SA had never run:
Sep 16 18:23:39 hosting1 spamd[2788]: spamd: result: Y 97 - BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,USER_IN_BLACKLIST scantime=2.1,size=1818,user=recipient@domain.com,uid=110,required_score=5.0,rhost=localhost,raddr=127.0.0.1,rport=/tmp/spamd_full.sock,mid=<message_id@mail.gmail.com>,bayes=0.000000,autolearn=no
Nothing related to SA gets put into the headers of the email, and the email goes right to the inbox. The account is set to tag.
Sep 16 18:23:39 hosting1 spamd[2788]: spamd: result: Y 97 - BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,USER_IN_BLACKLIST scantime=2.1,size=1818,user=recipient@domain.com,uid=110,required_score=5.0,rhost=localhost,raddr=127.0.0.1,rport=/tmp/spamd_full.sock,mid=<message_id@mail.gmail.com>,bayes=0.000000,autolearn=no
Nothing related to SA gets put into the headers of the email, and the email goes right to the inbox. The account is set to tag.