Spammers are abusing Google Groups lists of course, and I am sure they are working on it, but the issue is with the unsubscribe URL methods.. Comments at the bottom of the example..

eg..

(Relevant Information Only)


Return-Path: <emails1+bncbcg73he4qagbb3hd5xjqkgqetvjzjiy@onlineprod.press>

Received: from mail-ua0-f199.google.com (HELO mail-ua0-f199.google.com) (209.85.217.199)

Sender: emails1@onlineprod.press

X-BeenThere: emails1@onlineprod.press

Date: Wed, 7 Feb 2018 13:38:51 -0800 (PST)
From: by...@prodinfos.top
Message-Id: <ca99cc07-261a-4185-9682-ffcad60d3496@onlineprod.press>
Subject: =?UTF-8?Q?This_Is_The_Fastest_Method_Of_Creating_Millionaires=E2=80=A6?=

X-Original-Sender: by...@prodinfos.top
Precedence: list
Mailing-list: list Emails1@onlineprod.press; contact Emails1+owners@onlineprod.press
List-ID: <Emails1.onlineprod.press>
X-Spam-Checked-In-Group: Emails1@onlineprod.press
X-Google-Group-Id: 836059732772
List-Post: <https://groups.google.com/a/onlineprod.press/group/Emails1/post>, <mailto:Emails1@onlineprod.press> List-Help: <https://support.google.com/a/onlineprod.press/bin/topic.py?topic=25838>,
 <mailto:Emails1+help@onlineprod.press>
List-Archive: <https://groups.google.com/a/onlineprod.press/group/Emails1/>
List-Unsubscribe: <mailto:googlegroups-manage+836059732772+unsubscr...@googlegroups.com>,
 <https://groups.google.com/a/onlineprod.press/group/Emails1/subscribe>


However, if a non-google recipient receives that email, they can't actually utilize the un-subscribe URL, it redirects to...


Authorization Failed
This group is on a private domain.
Please sign in with an authorized account to view this content.

Just pointing it out..



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