Mail loop mitigation

Glen <glen@amsl.com> Wed, 11 November 2020 18:14 UTC

Return-Path: <glen@amsl.com>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 846543A0D1D for <ietf@ietfa.amsl.com>; Wed, 11 Nov 2020 10:14:12 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -101.909
X-Spam-Level:
X-Spam-Status: No, score=-101.909 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, USER_IN_WELCOMELIST=-0.01, USER_IN_WHITELIST=-100] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YXFW9rDz2B7I for <ietf@ietfa.amsl.com>; Wed, 11 Nov 2020 10:14:07 -0800 (PST)
Received: from mail.amsl.com (c8a.amsl.com [4.31.198.40]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 33B3A3A0957 for <ietf@ietf.org>; Wed, 11 Nov 2020 10:08:42 -0800 (PST)
Received: from mail.amsl.com (localhost [127.0.0.1]) by c8a.amsl.com (Postfix) with ESMTPS id 1321E3C245A for <ietf@ietf.org>; Wed, 11 Nov 2020 10:08:37 -0800 (PST)
Received: from [IPv6:2607:fb90:3648:4adb:f846:870:42f1:c15a] (unknown [IPv6:2607:fb90:3648:4adb:f846:870:42f1:c15a]) by c8a.amsl.com (Postfix) with ESMTPSA id D0EA13C245B for <ietf@ietf.org>; Wed, 11 Nov 2020 10:08:36 -0800 (PST)
Date: Wed, 11 Nov 2020 10:08:42 -0800
Subject: Mail loop mitigation
Message-ID: <2c94ioi8mpqhlsfh6p1666re.1605118121517@email.android.com>
From: Glen <glen@amsl.com>
To: ietf@ietf.org
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="--_com.ninefolders.hd3.email_17167371328085_alt"
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/N7E2uhpRSbpI9nSdL60ww1sR4PQ>
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf/>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 11 Nov 2020 18:14:13 -0000

Dear IETF list participants :


Our internal monitoring systems alerted us just now to an extremely high number of messages in the server mail queue.


Upon investigation, we discovered what you no doubt know by now, that a mail loop was going on with a particular user, and messages sent to the list were somehow being resent to the list by this subscriber.


We have blocked the subscriber at the gateway, in an attempt to stop the mail looping, and it appears to have worked.


Unfortunately, there were approximately 12,000 messages pending for this list, and we had no choice but to dump them all, to prevent delivery of additional looped messages.


This means that if you have sent a message to this list, and it has not come through, and has not shown up in the mail archive, then please resend your message to make sure everyone gets it.


Of course, just resend it one time please :-)


Thank you for your patience.


Glen

--

Glen Barney

IT Director

AMS (IETF secretariat)