Are you running one of the 2.x versions or older?
Are you running a 3.x version?
perl -MCPAN -e shell [as root] o conf prerequisites_policy ask install Mail::SpamAssassin quit |
Debian unstable: apt-get install spamassassin Gentoo: emerge mail-filter/spamassassin |
[unzip/untar the archive] cd Mail-SpamAssassin-* perl Makefile.PL make make install [as root] |