[Mailman-Users] UTF-8 From and Reply-to addresses not getting properly processed.

[Lindsay Haisley]

We're running Mailman 2.1.18-1 and have a list which is having a porn
spam problem. The list is set to discard posts from non-members, and
the list moderator has set various filters to try to filter on words
which contain "f***", as many do, however the Subject, From and Reply-
to addresses are all UTF-8 strings, and are apparently confusing
Mailman's decision-making functions, and these posts are ending up in
the administrative requests list.  Here's a sample set of headers:

Return-Path: <Abia at multi.net.pk>
Delivered-To: cyberpluckers at autoharp.org
Received: from 202-142-178-114.multi.net.pk ([::ffff:202.142.178.114])
  by linode.fmp.com with ESMTP; Sat, 15 Feb 2020 09:11:38 -0600
  id 000000000025B215.000000005E480A2B.00002589
Received: from unknown (103.65.14.20)
	by mail.naihautsui.co.kr with SMTP; Sat, 15 Feb 2020 15:02:48 -0800
Received: from asx121.turbo-inline.com ([41.36.184.152]) by qrx.quickslick.com with LOCAL; Sat, 15 Feb 2020 14:51:47 -0800
Received: from unknown (HELO snmp.otwaloow.com) (Sat, 15 Feb 2020 14:48:41 -0800)
	by rly04.hottestmile.com with QMQP; Sat, 15 Feb 2020 14:48:41 -0800
Received: from unknown (137.251.39.90)
	by mail.naihautsui.co.kr with ASMTP; Sat, 15 Feb 2020 14:48:03 -0800
Received: from mail.gimmicc.net [12.159.103.230] by smtp.endend.nl with ESMTP; Sat, 15 Feb 2020 14:40:00 -0800
Message-ID: <455601d5e40d$cd381490$538b0ca1 at Abia>
Reply-To: =?utf-8?B?IkFiaWEiIDxBYmlhQG11bHRpLm5ldC5waz4=?=
From: =?utf-8?B?IkFiaWEiIDxBYmlhQG11bHRpLm5ldC5waz4=?=
To: cyberpluckers at autoharp.org, cyberpluckers-owner at autoharp.org
Subject: =?utf-8?B?SSBJbnN0YUZ1Y2sgUmVxdWVzdCBpcyBQZW5kaW5n?=
Date: Sat, 15 Feb 2020 14:40:00 -0800
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="=_linode-9609-1581779501-0001-2"
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express Macintosh Edition - 5.01 (1630)
X-MimeOLE: Produced By Microsoft MimeOLE V5.01

MM is properly decoding the Subject in the message detail headers, but
not the From address.

Is there any way to get these get Mailman to properly handle these?

-- 
Lindsay Haisley       |  "The arc of history is long, but
FMP Computer Services |     it bends toward Justice"
512-259-1190          |
http://www.fmp.com    |        - Barack Obama