Mailu/core/rspamd/conf/milter_headers.conf

authenticated_headers = ["authentication-results"];
skip_local = false;
skip_authenticated = false;

use = ["x-spamd-bar", "x-spam-level", "x-virus", "authentication-results"];

routines {
  authentication-results {
    add_smtp_user = false;
  }
  x-virus {
    symbols = ["CLAM_VIRUS", "FPROT_VIRUS", "JUST_EICAR"];
  }
}