FILTER_SUBSYSTEM_SMTP_IN
if (pi->subsystems & FILTER_SUBSYSTEM_SMTP_IN)
fc->filter_subsystem |= FILTER_SUBSYSTEM_SMTP_IN;
filter_config->filter_subsystem |= FILTER_SUBSYSTEM_SMTP_IN;
fc->filter_subsystem |= FILTER_SUBSYSTEM_SMTP_IN;
filter_config->filter_subsystem |= FILTER_SUBSYSTEM_SMTP_IN;