[exim] Damn advertisers that don't get returns. What to do?

Hi,

I have some advertisers trying to email our hosted domains and they don't
accept bounces. I have 3 questions:

1. What should I do to make exim defer the queued emails after -lets say
4H?
2. I am sure thay are just ignoring some RFC 's. Where must I report
them?
3. What can I do to reject them from emailing us?

I wonder why they don't put empty return paths if they don't want their
emails to be returned back. Here are some senders:

    * duyuru@???
    * duyuru@???
    * bilgi@???

And a sample email (they are all alike):

Return-path: <duyuru@???>
Received: from mail.ad.index.com.tr ([195.87.191.10])
    by host.elaxxx.com with esmtps (SSLv3:AES256-SHA:256)
    (Exim 4.52)
    id 1EeukD-0006RP-FK
    for yusuf@???; Wed, 23 Nov 2005 15:33:13 +0200
Received: from sgunel ([81.215.207.181])
        by mail.ad.index.com.tr (SwiNT Mail Server v4.3) with SMTP id TAE05;
        Wed, 23 Nov 2005 15:03:25 +0200
Message-ID: <002101c5f02d$e9fcf1b0$8609000a@???>
Reply-To: "Neotech Duyuru" <sgunel@???>
From: Neotech Duyuru@???
To: yusuf@???
Date: Wed, 23 Nov 2005 15:00:42 +0200
Organization: =?iso-8859-9?Q?Neotech_A.=DE.?=
MIME-Version: 1.0
Content-Type: multipart/related;
    type="multipart/alternative";
    boundary="----=_NextPart_000_001D_01C5F03E.ACEE63B0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.2180
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
Subject: Video Cekimi Yapmak Hiç Bu Kadar Kolay Olmadi...
X-Antivirus: Clear (ClamAV 0.87.1/1185/Wed Nov 23 11:46:07 2005)

Awaiting valuable answers.