{% if helpers.exists('OPNsense.postfix.general.enabled') and OPNsense.postfix.general.enabled == '1' %}
{%   if helpers.exists('OPNsense.postfix.headerchecks.headerchecks.headercheck') %}
{%     for headercheck_list in helpers.toList('OPNsense.postfix.headerchecks.headerchecks.headercheck') %}
{%       if headercheck_list.enabled == '1' and headercheck_list.filter == 'WHILE_RECEIVING' %}
{{ headercheck_list.expression }}
{%       endif %}
{%     endfor %}
{%   endif %}
{% endif %}
