MX_IMPLICIT {
  expression = "MX_GOOD and MX_MISSING";
  score = -0.01;
}
VIRUS_FOUND {
  expression = "CLAM_VIRUS & !MAILCOW_WHITE";
  score = 2000;
}
SPF_FAIL_NO_DKIM {
  expression = "R_SPF_FAIL & R_DKIM_NA & !MAILCOW_WHITE";
  score = 10;
}
