This is currently still an issue, and looking at the headers it seems that the current mail server is not properly marked as allowed.
Delivered-To: redacted
Received: by 10.159.49.30 with SMTP id m30csp722722uab;
Sat, 22 Apr 2017 06:59:51 -0700 (PDT)
X-Received: by 10.202.78.214 with SMTP id c205mr9266912oib.20.1492869591138;
Sat, 22 Apr 2017 06:59:51 -0700 (PDT)
Return-Path: <
[email protected]>
Received: from smtp.osdev.org ([2600:3c00::f03c:91ff:fedf:5242])
by mx.google.com with ESMTP id t28si7159637otc.102.2017.04.22.06.59.51
for <redacted>;
Sat, 22 Apr 2017 06:59:51 -0700 (PDT)
Received-SPF: fail (google.com: domain of
[email protected] does not designate 2600:3c00::f03c:91ff:fedf:5242 as permitted sender) client-ip=2600:3c00::f03c:91ff:fedf:5242;
Authentication-Results: mx.google.com;
spf=fail (google.com: domain of
[email protected] does not designate 2600:3c00::f03c:91ff:fedf:5242 as permitted sender)
[email protected]Received: from smtp.osdev.org (smtp.osdev.org [173.255.206.39]) by smtp.osdev.org (Postfix) with ESMTP id D5F0CC123 for <redacted>; Sat, 22 Apr 2017 09:59:50 -0400 (EDT)
Subject: Reactivate your account
To: davidv1992 <redacted>
From: <
[email protected]>
Reply-To: <
[email protected]>
Sender: <
[email protected]>
MIME-Version: 1.0
Message-ID: <
[email protected]>
Date: Sat, 22 Apr 2017 08:59:50 -0500
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: phpBB3
X-MimeOLE: phpBB3
X-phpBB-Origin: phpbb://forum.osdev.org
X-AntiAbuse: Board servername - forum.osdev.org
X-AntiAbuse: User_id - 3761
X-AntiAbuse: Username - davidv1992
X-AntiAbuse: User IP - 92.110.183.84
I did some digging in the dns records, and it seems that the underlying issue is that the smtp server contacts googles over ipv6 using an ipv6 adress that is not associated with smpt.osdev.org