For the record, here is the Agent 8 filter I am currently using with
considerable effect:
"subject: ( bandar | terpercaya | mudah | terbaik | terbaru | menang
| situs | paling | gacor | nikmati | ihokibet | daftar | alternatif )
& message-id:
googlegroups.com"
and
"subject: {\?[^?]*\?[^?]*\?[^?]*\?}" (looks for four question marks)
Be sure to omit the quotes.
The leakage is manageable.
Joe Gwinn