http://www.perlmonks.org?node_id=1216574


in reply to Re^2: minicpan module_filters not working as expected
in thread minicpan module_filters not working as expected

I'm not sure whether I located the right spot in the source, but
return 1 if $self->__do_filter($self->{path_filters}, $args->{path +}); return 1 if $self->__do_filter($self->{module_filters}, $args->{modu +le});
seems to suggest you should try with qr/Mail::Delivery/i (double colon instead of dash).