Not to forget the fix at: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202283 which is also needed with Net::DNS 1.01 or later.
Sorry, wrong link, should be: https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7231
Already cherrypicked in the FreeBSD port of SpamAssassin: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202283
Mark