In 3.09, the config file has changed incompatibly from that in 2.05.
(The old format was a Debian-specific patch.  Upstream chose a different
format.)  Also there have been some architectural changes. See
/usr/share/doc/libmail-bulkmail-perl/migration.guide.txt and the files
in /usr/share/doc/libmail-bulkmail-perl/examples.