Gizmo I just rplied and deleted a message cause I posted wrong, I had received yet another spam note regarding a PM notification email.
Here is the raw source of the email we have discussed

Quote
Return-Path: <>
Delivered-To: forum@britbike.com
Received: from vps.britbike.com
by vps.britbike.com with LMTP
id Ye1wFI+EWGDO0wQA+mfXXX
(envelope-from <>)
for <forum@britbike.com>; Mon, 22 Mar 2021 11:50:39 +0000
Return-path: <>
Envelope-to: forum@britbike.com
Delivery-date: Mon, 22 Mar 2021 11:50:39 +0000
Received: from cat.oak.relay.mailchannels.net ([23.83.215.31]:47974)
by vps.britbike.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
(Exim 4.94)
id 1lOJ4u-001KF3-R1
for forum@britbike.com; Mon, 22 Mar 2021 11:50:39 +0000
Received: by relay.mailchannels.net (Postfix)
id 2B82B481BEC; Mon, 22 Mar 2021 11:49:54 +0000 (UTC)
Date: Mon, 22 Mar 2021 11:49:54 +0000 (UTC)
From: MAILER-DAEMON@mailchannels.net (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
To: forum@britbike.com
Auto-Submitted: auto-replied
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="17458481EE9.1616413794/relay.mailchannels.net"
Content-Transfer-Encoding: 8bit
Message-Id: <20210322114954.2B82B481BEC@relay.mailchannels.net>
X-Spam-Status: No, score=-2.5
X-Spam-Score: -24
X-Spam-Bar: --
X-Ham-Report: Spam detection software, running on the system "vps.britbike.com",
has NOT identified this incoming email as spam. The original
message has been attached to this so you can view it or label
similar future email. If you have any questions, see
root\@localhost for details.


Content preview: This is the mail system at host relay.mailchannels.net. I'm
sorry to have to inform you that your message could not be delivered to one
or more recipients. It's attached below. For further assistance, please send
mail to postmaster.
Content analysis details: (-2.5 points, 6.0 required)
pts rule name description
---- ---------------------- --------------------------------------------------
0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was
blocked. See
http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
for more information.
[URIs: mailchannels.net]
-2.1 INTERSERVER_RULE_GOOD_NETWORK RBL: Good or wellknown network
decrease score by 2.1
[23.83.215.31 listed in goodrbl.interserver.net]
-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%
[score: 0.0000]
1.5 KAM_MXURI URI: URI begins with a mail exchange prefix, i.e.
mx.[...]
0.0 HTML_MESSAGE BODY: HTML included in message
0.0 KAM_DMARC_STATUS Test Rule for DKIM or SPF Failure with Strict
Alignment
X-Spam-Flag: NO

This is a MIME-encapsulated message.

--17458481EE9.1616413794/relay.mailchannels.net
Content-Description: Notification
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

This is the mail system at host relay.mailchannels.net.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<tcarlile@btinternet.com>: host mx.lb.btinternet.com[213.120.69.2] said: 554
Message rejected on 2021/03/22 11:49:54 GMT, policy (3.2.1.1) ID
(6045E95F02A1D8B0) - Your message looks like SPAM or has been reported as
SPAM (in reply to end of DATA command)

--17458481EE9.1616413794/relay.mailchannels.net
Content-Description: Delivery report
Content-Type: message/delivery-status
Content-Transfer-Encoding: 8bit

Reporting-MTA: dns; relay.mailchannels.net
X-Postfix-Queue-ID: 17458481EE9
X-Postfix-Sender: rfc822; forum@britbike.com
Arrival-Date: Mon, 22 Mar 2021 11:49:51 +0000 (UTC)

Final-Recipient: rfc822; tcarlile@btinternet.com
Original-Recipient: rfc822;tcarlile@btinternet.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx.lb.btinternet.com
Diagnostic-Code: smtp; 554 Message rejected on 2021/03/22 11:49:54 GMT, policy
(3.2.1.1) ID (6045E95F02A1D8B0) - Your message looks like SPAM or has been
reported as SPAM

--17458481EE9.1616413794/relay.mailchannels.net
Content-Description: Undelivered Message
Content-Type: message/rfc822
Content-Transfer-Encoding: 8bit

Return-Path: <forum@britbike.com>
Received: from relay.mailchannels.net (localhost [127.0.0.1])
by relay.mailchannels.net (Postfix) with ESMTP id 17458481EE9
for <tcarlile@btinternet.com>; Mon, 22 Mar 2021 11:49:51 +0000 (UTC)
Received: from vps.britbike.com (100-101-162-6.trex.outbound.svc.cluster.local [100.101.162.6])
(Authenticated sender: interserver)
by relay.mailchannels.net (Postfix) with ESMTPA id 547DD481D5D
for <tcarlile@btinternet.com>; Mon, 22 Mar 2021 11:49:48 +0000 (UTC)
X-Sender-Id: interserver|x-authuser|forum@britbike.com
Received: from vps.britbike.com (vps.britbike.com [199.231.189.8])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384)
by 100.101.162.6 (trex/6.1.1);
Mon, 22 Mar 2021 11:49:51 +0000
X-MC-Relay: Neutral
X-MailChannels-SenderId: interserver|x-authuser|forum@britbike.com
X-MailChannels-Auth-Id: interserver
X-Abaft-Thread: 763fda58352228da_1616413790906_4041516811
X-MC-Loop-Signature: 1616413790906:2572652304
X-MC-Ingress-Time: 1616413790906
Received: from [199.231.189.8] (port=52510 helo=www.britbike.com)
by vps.britbike.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
(Exim 4.94)
(envelope-from <forum@britbike.com>)
id 1lOJ47-001KEs-4s
for tcarlile@btinternet.com; Mon, 22 Mar 2021 11:49:47 +0000
Date: Mon, 22 Mar 2021 11:49:47 +0000
To: tcarlile@btinternet.com
From: Britbike forum <forum@britbike.com>
Subject: Your Registration Has Been Approved
Message-ID: <eec9d5e32df23bc165f62424e87a7af2@www.britbike.com>
X-Mailer: PHPMailer 5.2.28 (https://github.com/PHPMailer/PHPMailer)
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="b1_eec9d5e32df23bc165f62424e87a7af2"
Content-Transfer-Encoding: 8bit
X-AuthUser: forum@britbike.com

This is a multi-part message in MIME format.

--b1_eec9d5e32df23bc165f62424e87a7af2
Content-Type: text/plain; charset=us-ascii

Britbike forum - Britbike forum #1 online since 1996!
---------------------------

Hello Trevsc,

Your registration of 'Trevsc' at Britbike forum has been approved.

---------------------------
This email was auto-generated - please do not reply directly to this message.

To control which emails we send you, adjust your email preferences at:
https://www.britbike.com/forums/ubbthreads.php?ubb=editdisplay

Sent by Britbike forum at https://www.britbike.com/forums


--b1_eec9d5e32df23bc165f62424e87a7af2
Content-Type: text/html; charset=us-ascii

<!doctype html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Britbike forum</title>
</head>
<body>
<table style="height:100%;width:100%!important;padding:0;border-spacing:0;">
<tr>
<td style="background-color:#fff; border-collapse:collapse; border-radius:3px; box-shadow:0 2px 2px 0 rgba(0,0,0,0.14),0 1px 5px 0 rgba(0,0,0,0.12),0 3px 1px -2px rgba(0,0,0,0.2); font-family:arial,helvetica,sans-serif; padding:2px 2px 12px;" >
<table style="border-spacing:0;margin:0 auto!important;min-width:400px;width:100%;padding:0;">
<tr>
<td style="background-color:#104cb5; border-radius:3px 3px 0 0; color:#fff; font-size:19px; font-weight:700; padding:8px 8px 10px 8px; text-align:center;" >
Britbike forum
<br><span style="font-size:11px;">Britbike forum #1 online since 1996!</span></td>
</tr>
<tr>
<td style="background-color:#fff; color:#272a34; font-size:13px; line-height:1.5; padding:7px 8px 12px 8px;" >
<span style="font-weight:700;">Hello Trevsc,</span><br><br>
Your registration of 'Trevsc' at Britbike forum has been approved.
</td>
</tr>
<tr>
<td style="background-color:#fff; border-top:1px solid #263238; color:#424242; font-size:12px; line-height:150%; padding:8px 8px 6px 8px; text-align:center;" >
<b>Please do not reply directly to this email</b><br><a href="https://www.britbike.com/forums/">Preferences</a> · <a href="https://www.britbike.com/forums">Update profile</a><br>Sent by Britbike forum at <a href="https://www.britbike.com/forums">https://www.britbike.com/forums</a>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>



--b1_eec9d5e32df23bc165f62424e87a7af2--


--17458481EE9.1616413794/relay.mailchannels.net--
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