Dealing with email from another persons bad email forward

I have begun receiving a bunch of unwanted email of my gmail-account.

It is not spam: most of it personal mails (birthday invitations etc.) or the usual "funny emails" some people forward to all their friends. All of it is meant for myusername@san.rr.com (which is not me), but it is apparently being forwarded to myusername@gmail.com. The headers sometimes contains To: myusername@san.rr.com, but it is also often just To: <undisclosed-recipients>, but from context I can see that it is for myusername@san.rr.com.

I have sent emails to myusername@san.rr.com, abuse@san.rr.com and Road Runner customer-service, but abuse directs me to customer-service, customer-service claims it is the user that has set up a bad forward, and the user claims that there is no forward on his address.

I was finally just asked to set up a filter that deleted all mails to "myusername@san.rr.com", but first of all, I don't feel this is something that should be resolved at my end and secondly it doesn't handle the many messages that have undisclosed recipients.

The user gets a lot of email and it of course passes right through my spam-filter, so it gets really annoying.

Do any one know the best way to escalate this? Road Runner is of course quite uninterested in my problem since I am not a customer of theirs.

Here are two sample mail-headers (one with disclosed recipient, one with undisclosed) in case that can clear something up:

Delivered-To: myusername@gmail.com
Received: by 10.100.107.9 with SMTP id f9cs58570anc;
        Wed, 2 Sep 2009 16:35:56 -0700 (PDT)
Received: by 10.220.69.89 with SMTP id y25mr11938757vci.67.1251934555791;
        Wed, 02 Sep 2009 16:35:55 -0700 (PDT)
Return-Path: <sender@iteachyou.com>
Received: from cdptpa-imtalb.mail.rr.com (cdptpa-imtalb.mail.rr.com [75.180.132.34])
        by mx.google.com with ESMTP id 2si660988vws.53.2009.09.02.16.35.55;
        Wed, 02 Sep 2009 16:35:55 -0700 (PDT)
Received-SPF: softfail (google.com: domain of transitioning sender@iteachyou.com does not designate 75.180.132.34 as permitted sender) client-ip=75.180.132.34;
Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning sender@iteachyou.com does not designate 75.180.132.34 as permitted sender) smtp.mail=sender@iteachyou.com
Received: from cdptpa-mxlb.mail.rr.com ([10.127.255.85])
          by cdptpa-imta04.mail.rr.com with ESMTP
          id <20090902233555061.GYOW19633@cdptpa-imta04.mail.rr.com>
          for <myusername@san.rr.com>; Wed, 2 Sep 2009 23:35:55 +0000
Return-Path: <sender@iteachyou.com>
X-Cloudmark-Score: 0
X-RR-Connecting-IP: 68.230.241.39
X-Authority-Analysis: v=1.0 c=1 a=WW68/717mJ/IxFGJVaUluQ==:17 a=uDSnT5Gsb0Uvxgln8bIA:9 a=P6rNy0mZG7YvdLfcDMA1IqDA5ssA:4 a=RAiJgP8TVDc-xrh9QLcA:9 a=eUfj4FIBVQpWJGLMHPsA:7 a=5kGOJcZrrlWJM8P1TogWmHkH84cA:4
Received: from [68.230.241.39] ([68.230.241.39:47080] helo=fed1rmmtao107.cox.net)
    by cdptpa-iedge05.mail.rr.com (envelope-from <sender@iteachyou.com>)
    (ecelerity 2.2.2.39 r()) with ESMTP
    id 66/8B-21364-A510F9A4; Wed, 02 Sep 2009 23:35:54 +0000
Received: from fed1rmimpo03.cox.net ([70.169.32.75])
          by fed1rmmtao107.cox.net
          (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP
          id <20090902233553.XWHJ21470.fed1rmmtao107.cox.net@fed1rmimpo03.cox.net>
          for <myusername@san.rr.com>; Wed, 2 Sep 2009 19:35:53 -0400
Received: from GiniPC ([68.107.74.111])
    by fed1rmimpo03.cox.net with bizsmtp
    id bzbs1c0092Q4CF004zbsrK; Wed, 02 Sep 2009 19:35:52 -0400
X-VR-Score: -100.00
X-Authority-Analysis: v=1.0 c=1 a=uDSnT5Gsb0Uvxgln8bIA:9
 a=SySS9F5WOmxjBnLKSjJdsnV6racA:4 a=RAiJgP8TVDc-xrh9QLcA:9
 a=eUfj4FIBVQpWJGLMHPsA:7 a=5kGOJcZrrlWJM8P1TogWmHkH84cA:4
X-CM-Score: 0.00
Message-ID: <9593F3769C6D44CF9EA0F4BA17F79FD5@GiniPC>
From: "Sender" <sender@iteachyou.com>
To: "Not my name" <myusername@san.rr.com>
Subject: Gini's b-day party this Saturday
Date: Wed, 2 Sep 2009 16:35:51 -0700
MIME-Version: 1.0
Content-Type: multipart/alternative;
    boundary="----=_NextPart_000_3A03_01CA2BEB.6F523D50"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Windows Mail 6.0.6001.18000
X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049

—

Delivered-To: myusername@gmail.com
Received: by 10.100.107.9 with SMTP id f9cs78745anc;
        Thu, 10 Sep 2009 03:30:10 -0700 (PDT)
Received: by 10.220.88.220 with SMTP id b28mr1166529vcm.35.1252578609560;
        Thu, 10 Sep 2009 03:30:09 -0700 (PDT)
Return-Path: <sender@san.rr.com>
Received: from cdptpa-omtalb.mail.rr.com (cdptpa-omtalb.mail.rr.com [75.180.132.122])
        by mx.google.com with ESMTP id 41si2006694vws.136.2009.09.10.03.30.08;
        Thu, 10 Sep 2009 03:30:09 -0700 (PDT)
Received-SPF: pass (google.com: domain of sender@san.rr.com designates 75.180.132.122 as permitted sender) client-ip=75.180.132.122;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of sender@san.rr.com designates 75.180.132.122 as permitted sender) smtp.mail=sender@san.rr.com
Received: from home ([66.75.239.14]) by cdptpa-omta03.mail.rr.com with SMTP
          id <20090910102957644.TSSX26991@cdptpa-omta03.mail.rr.com>;
          Thu, 10 Sep 2009 10:29:57 +0000
Message-ID: <DC802D49ADEB4ACAAEE6DF35223157C5@home>
From: "Sender" <sender@san.rr.com>
Cc: "Sender" <sender@san.rr.com>
To: <Undisclosed-Recipient:;>
Subject:  ELEPHANTS @ MFUWE LODGE, AFRICA
Date: Thu, 10 Sep 2009 03:29:54 -0700
MIME-Version: 1.0
Content-Type: multipart/related;
    type="multipart/alternative";
    boundary="----=_NextPart_000_005F_01CA31C6.F6D80BC0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.5843
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579