Bugs item #1437581, was opened at 2006-02-23 13:01 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100103&aid=1437581...

Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: (un)subscribing Group: 2.1 (stable) Status: Open Resolution: None Priority: 5 Submitted By: Bruce Scherzinger (bascherz) Assigned to: Nobody/Anonymous (nobody) Summary: Mailman Auto-unsubscribes Bad Addresses?

Initial Comment: I haven't seen any settings for this, and I can only describe it based on the information that I have. But today I received bounce notices identically timestamped for three separate email addresses in the same domain. The notices all indicated the addresses had been unsubscribed from a specific Mailman list. I don't know what initiated the action, and these same addresses are still subscribed to other, less- frequently used lists.

I sent emails directly to the three addresses to notify them of the issue, and I got back a response from their email server as follows (actual email addresses omitted or replaced for privacy reasons):

- - - - - - - - - - - - - - - - Return-Path: <> X-Envelope-To: <my_email_address> X-Spam-Status: No, hits=2.4 required=5.0 tests=AWL: -0.181,HTML_30_40: 0.879,HTML_MESSAGE: 0.001, MIME_HTML_MOSTLY: 1.54,VIRUS_WARNING268B: 0.2 X-Spam-Level: ** Return-Path: <> Delivered-To: <my_email_address> Received: (qmail 29847 invoked by uid 399); 23 Feb 2006 17:21:13 -0000 X-Virus-Scan: Scanned by clamdmail 0.15 (no viruses); Thu, 23 Feb 2006 11:21:13 -0600 Received: from unknown (HELO eastrmmtao06.cox.net) (68.230.240.33) by mail.opentransfer.com with SMTP; 23 Feb 2006 17:21:13 -0000 To: <my_email_address> From: Mail Administrator Postmaster@cox.net Reply-To: Postmaster@cox.net Subject: Mail System Error - Returned Mail Date: Thu, 23 Feb 2006 12:21:06 -0500 Message-ID: <omitted> MIME-Version: 1.0 Content-Type: multipart/report; report-type=delivery-status; Boundary="===========================_ _= 9638061(9108)1140715266"

--===========================_ _= 9638061(9108) 1140715266 Content-Type: text/plain

This Message was undeliverable due to the following reason:

Each of the following recipients was rejected by a remote mail server. The reasons given by the server are included to help you determine why each recipient was rejected.

Recipient: addr1@erols.com Reason: #5.1.1 bad address addr1@erols.com

Recipient: addr2@erols.com Reason: #5.1.1 bad address addr2@erols.com

Recipient: addr3@erols.com Reason: #5.1.1 bad address addr3@erols.com - - - - - - - - - - - - - - - -

So, all three addresses are bad. Does Mailman automatically unsubscribe addresses if it can't deliver to them? Or, is there a way to spoof it to get it to delete addresses? Is it possible the email server (erols.com in this case) can determine that there are messages being sent from a Mailman email list and send unsubscribe requests to the Mailman server to make them stop?

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You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=100103&aid=1437581...