config problem inside policy bank

[Patrick Proniewski]

Hello,

I'm running into a syntax problem in a policy bank. I've defined this: 

$policy_bank{'SMTP'} = {
   spam_tag_level_maps  => 2.0,
   spam_tag2_level_maps => 6.5,
   spam_kill_level_maps => 6.5,
   spam_dsn_cutoff_level_maps => 15,
   banned_quarantine_to => undef, # no quarantine for users of smtp:25
};

But it triggers this kind of log entries:

amavis[37725]: (!)loading policy bank "SMTP": unknown field "banned_quarantine_to"

What is the proper syntax here?
I'm using the freebsd pkg amavisd-new-2.9.1_1,1

Thanks,
Patrick