require
 [ "date"
 , "fileinto"
 , "mailbox"
 , "variables"
 ];

if currentdate :matches "year"  "*" { set "year"  "${1}"; }
if currentdate :matches "month" "*" { set "month" "${1}"; }

if exists "List-ID" {
	if header :matches "List-ID" "*<*.*.*>*" {
		set "list"   "${2}";
		set "domain" "${3}";
	 }
	fileinto :create "Lists.${domain}.${list}.${year}.${month}";
	stop;
 }