The following are my (happy) Mail-SpamAssassin-3.2.5 installation
observations.

Seen at untarring:
Please make files dates reflect when they were last changed. Not all
just 2008-06-10.

We see
checking module dependencies and their versions...
NOTE: the optional Mail::SPF module is not installed...
Please say if these are Perl modules or SpamAssassin modules or Cpan
Perl modules, etc., even if you say so in README, etc.

After the first of
perl Makefile.PL PREFIX=$HOME && make && make install
we expect cheery messages, "Good boy, looks good", well, at least the
latter two don't bomb out :-)

(Anyway, still accruing debris of older versions and older sa-updates in
the file tree.)