Banned files in a policy bank

[Michael Orlitzky]

I've got two MXes now, with the second using amavis on localhost:10026.
I've set up a policy bank:

  $policy_bank{'mx1.example.com'} = {
    banned_filename_maps => ['mx1.example.com'],
  };

  $interface_policy{'10026'} = 'mx1.example.com';

And the associated banned rules:

  %banned_rules = (
    'DEFAULT' => $banned_filename_re,
    'mx1.example.com' => new_RE(
      qr'.\.(exe|vbs|pif|scr|bat|cmd|com|cpl|dll|zip)$'i
    ),
  );

The mail goes to the right place, but nothing happens when amavis scans
a message with an exe attachment:

  Feb 11 16:28:50 mx1 amavis[29765]: (29765-01) Passed CLEAN
  {RelayedInbound}, mx1.example.com [140.211.166.183]:36193
  [65.213.236.244] <m...@example.org> -> <mjot...@example.com>,
  Message-ID: <54dbc98b.4020...@gentoo.org>, mail_id: uxgYbqgxo2cX,
  Hits: -105.031, size: 653323, queued_as: 3kjDcL2HyfzMv0f, 899 ms

Does anyone see what I'm doing wrong? All of the other banned_foo
variables are at their defaults.