mailcow/data/conf/rspamd/local.d/external_services.conf

oletools {
  # default olefy settings
  servers = "olefy:10055";
  # needs to be set explicitly for Rspamd < 1.9.5
  scan_mime_parts = true;
  # mime-part regex matching in content-type or filename
  # block all macros
  extended = true;
  max_size = 5242880;
}