Вот примеры заголовков письма, отправленного на адрес Google.
Delivered-To: *@gmail.com
Received: by 10.14.100.10 with SMTP id y10csp109835eef;
Tue, 8 May 2012 01:44:02 -0700 (PDT)
Received: by 10.216.214.82 with SMTP id b60mr2383310wep.38.1336466642775;
Tue, 08 May 2012 01:44:02 -0700 (PDT)
Return-Path: <www@mywebsite.com>
Received: from mywebsite.com (mywebsite.com. [mywebsite-ip])
by mx.google.com with ESMTP id p5si22005299wel.112.2012.05.08.01.44.02;
Tue, 08 May 2012 01:44:02 -0700 (PDT)
Received-SPF: pass (google.com: best guess record for domain of www@mywebsite.com designates mywebsite-ip as permitted sender) client-ip=mywebsite-ip;
Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of www@mywebsite.com designates mywebsite-ip as permitted sender) smtp.mail=www@mywebsite.com; dkim=pass header.i=@mywebsite.com
Received: by mywebsite.com (Postfix, from userid 80)
id E8A63322; Tue, 8 May 2012 08:43:52 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=mywebsite.com; s=dkim;
t=1336466632; bh=Z7xJudGc3lcz/jf/0hPLSOBFSCA07D0D3oJwgQbIhn4=;
h=To:Subject:Date:From;
b=ZSc4A/aUALtqhVe88Nc5QDaWanKMOZgs3PEed99P42amZEhrp3Q3Qi1F90KJ9MuzK
ZBzMmvycM8cSXdUno8mJZhjtPU4YEzgP3BetLZImlZC8Z0H84YVc9FGimRyt5LlOVI
Zb13gvWL4ihO7ABSte29AewocINOtumktA+hZ5UQ=
To: "test" <*@gmail.com>
Subject: Verifica indirizzo email
X-PHP-Script: _/index.php for my-ip
Message-ID: <1336466632.4fa8dcc8e42e8@_>
Date: Tue, 08 May 2012 08:43:52 +0000
From: "mywebsite.com" <accounts@mywebsite.com>
MIME-Version: 1.0
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Ciao test, grazie per esserti registrato a mywebsite.<br /><br />Segui que=
sto link per validare il tuo indirizzo email:<br /><br />http://mywebsite.=
com/user/validate_email?a=3D1-35ae755914
Я отправляю около 20 писем в день; ничего страшного! IP-адрес, с которого я отправляю, не находится в черном списке. Обратный IP-адрес правильный.
Проверки DKIM и SPF пройдены.
Что бы это могло быть?