Path: ...!news.mixmin.net!weretis.net!feeder8.news.weretis.net!newsfeed.xs3.de!ereborbbs.duckdns.org!.POSTED.p4fc72407.dip0.t-ipconnect.de!not-for-mail
From: Kyonshi <gmkeros@gmail.com>
Newsgroups: news.software.nntp,news.software.misc
Subject: [Cleanfeed] Block specific crosspost groups
Date: Sat, 24 Aug 2024 23:08:56 +0200
Organization: Erebor InterNetNews
Message-ID: <vadi57$cg1$6@ereborbbs.duckdns.org>
NNTP-Posting-Host: c3066ed76bae8bcc0e476efb157ff758
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 24 Aug 2024 21:08:55 -0000 (UTC)
Injection-Info: ereborbbs.duckdns.org; posting-host="p4fc72407.dip0.t-ipconnect.de:79.199.36.7";
	logging-data="12801"; mail-complaints-to="usenet@ereborbbs.duckdns.org"
User-Agent: Mozilla Thunderbird
Content-Language: en-US
Bytes: 1270
Lines: 4

So, I have cleanfeed running, but somehow I still don't quite get how 
this is supposed to work. I used the bad_groups file to specify a few 
groups that should be dropped, and expected that messages to all these 
groups would be dropped. This doesn't seem to be the case though.
How could I drop all messages which are crossposted to one particular group?