Since migration to mailman 3, administrative requests no longer have List-Id header, so I can't filter them reasonably.

Example:
{{{
Return-Path: test-announce-bounces+kparal=redhat.com@lists.fedoraproject.org
Received: from zmta02.collab.prod.int.phx2.redhat.com (LHLO
zmta02.collab.prod.int.phx2.redhat.com) (10.5.81.9) by
zmail17.collab.prod.int.phx2.redhat.com with LMTP; Thu, 26 Nov 2015
05:09:28 -0500 (EST)
Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22])
by zmta02.collab.prod.int.phx2.redhat.com (Postfix) with ESMTP id 2DDDB1219D8
for kparal@mail.corp.redhat.com; Thu, 26 Nov 2015 05:09:28 -0500 (EST)
Received: from mx1.redhat.com (ext-mx08.extmail.prod.ext.phx2.redhat.com [10.5.110.32])
by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tAQA9SJL018178
(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
for kparal@redhat.com; Thu, 26 Nov 2015 05:09:28 -0500
Received: from bastion.fedoraproject.org (bastion01.phx2.fedoraproject.org [10.5.126.12])
by mx1.redhat.com (Postfix) with ESMTP id 4A664C0D222A
for kparal@redhat.com; Thu, 26 Nov 2015 10:09:27 +0000 (UTC)
Received: from mailman01.phx2.fedoraproject.org (mailman01.phx2.fedoraproject.org [10.5.126.36])
by bastion01.phx2.fedoraproject.org (Postfix) with ESMTP id 56404601FC03
for kparal@redhat.com; Thu, 26 Nov 2015 10:09:26 +0000 (UTC)
Received: from mailman01.phx2.fedoraproject.org (localhost [IPv6:::1])
by mailman01.phx2.fedoraproject.org (Postfix) with ESMTP id 08B01203BF7BC
for kparal@redhat.com; Thu, 26 Nov 2015 10:09:29 +0000 (UTC)
Received: from mailman01.phx2.fedoraproject.org (localhost [IPv6:::1])
by mailman01.phx2.fedoraproject.org (Postfix) with ESMTP id ACCF1203BF7BC
for test-announce-owner@lists.fedoraproject.org; Thu, 26 Nov 2015 10:09:09 +0000 (UTC)
Subject: test-announce@lists.fedoraproject.org post from jkurik@redhat.com requires approval
From: test-announce-owner@lists.fedoraproject.org
To: test-announce-owner@lists.fedoraproject.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============4766687592863343945=="
Message-ID: 20151126100908.1078.92100@mailman01.phx2.fedoraproject.org
Date: Thu, 26 Nov 2015 10:09:08 +0000
Precedence: bulk
X-Mailman-Version: 3.1.0
Message-ID-Hash: MR4APKFMXQ6INB5S743WZ5GSYLPV5XVL
X-Message-ID-Hash: MR4APKFMXQ6INB5S743WZ5GSYLPV5XVL
X-MailFrom: test-announce-bounces@lists.fedoraproject.org
X-RedHat-Spam-Score: 1.7 * (ALL_TRUSTED,BAYES_99,BAYES_999,RP_MATCHES_RCVD) 10.5.126.12 bastion01.phx2.fedoraproject.org 10.5.126.12 bastion01.phx2.fedoraproject.org test-announce-bounces+kparal=redhat.com@lists.fedoraproject.org
X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22
X-Scanned-By: MIMEDefang 2.78 on 10.5.110.32
}}}