header __THE_BAT X-Mailer /^The Bat/ body __BROKEN_LINK /^[\w\.\-]{1,25}\s\.com\s*$/ meta SMALL_MIND __THE_BAT && __BROKEN_LINK score SMALL_MIND 3.5
Linting showed the header needs this: header __THE_BAT X-Mailer =~ /^The Bat/ With that in place I installed it as /etc/mail/spamassassin/small-mind.cf. Thanks!