Unsubscribe threat

Hi, all, I have just received an email from the ezmlm program managing the trinity-users(a)lists.pearsoncomputing.net mailing list. It is threatening to unsubscribe me if messages from me to someone I have never heard of, who is presumably getting the emails because he is subscribed to this list, bounce again. Below is some of the header. I don't want to be summarily unsubscribed, and don't understand what I can do about it anyway, given that it is not my email address that is bouncing anything, so far as I can see. But I am not good with headers. So - what can I do to be allowed to continue on this list? Lisi --- Enclosed is a copy of the bounce message I received. Return-Path: <MAILER-DAEMON(a)vali.starlink.edu> Received: (qmail 12676 invoked by uid 64014); 10 Sep 2012 08:47:44 -0500 Received: by vali.starlink.edu (Postfix) id 567C84560252; Mon, 10 Sep 2012 08:47:44 -0500 (CDT) Date: Mon, 10 Sep 2012 08:47:44 -0500 (CDT) From: MAILER-DAEMON(a)vali.starlink.edu (Mail Delivery System) Subject: Undelivered Mail Returned to Sender To: trinity-users-return-3524-lisi.reisz=gmail.com(a)lists.pearsoncomputing.net Auto-Submitted: auto-replied MIME-Version: 1.0 Content-Type: multipart/report; report-type=delivery-status; boundary="833714560269.1347284864/vali.starlink.edu" Content-Transfer-Encoding: 7bit Message-Id: <20120910134744.567C84560252(a)vali.starlink.edu> This is a MIME-encapsulated message.