gistfile1.txt

if allof(
	header :contains ["X-Spam-Flag"] "YES",
	header :value "ge" :comparator "i;ascii-numeric" ["X-Spam-score"] ["15"],
	not header :contains "X-Spam-Score" "-",
	not header :contains "X-Spam-Score" "0.0"
	) {
		discard;
		stop;
}
if anyof(
	header :contains ["X-Spam-Flag"] "YES",
	header :matches ["X-Antivirus-Spam-Check"] "spam *"
	) {
		fileinto "Junk Messages";
		stop;
}