Цитата: Исходник покажи (заголовки письма Received:, X-Received:, Date, тогда можно будет сказать, правильная ли.
Вот, например:
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Received: by 10.152.114.103 with SMTP id jf7mr19427384lab.22.1325102790574;
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Return-Path: <gluck@mail.subscribe.ru>
Received: from gato56.subscribe.ru (gato56.subscribe.ru. [81.222.129.56])
by mx.google.com with ESMTP id nq10si27266623lab.26.2011.12.28.12.06.29;
Wed, 28 Dec 2011 12:06:30 -0800 (PST)
Received-SPF: pass (google.com: domain of gluck@mail.subscribe.ru designates 81.222.129.56 as permitted sender) client-ip=81.222.129.56;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of gluck@mail.subscribe.ru designates 81.222.129.56 as permitted sender) smtp.mail=gluck@mail.subscribe.ru
Received: id C4CE4106C527-1325099989
X-Felis-Queue-Id: 20111228231838
Return-Path: <gluck@mail.subscribe.ru>
Precedence: normal
List-Id: <import20111221114353.aeroflot.pro.subscribe.ru>
List-Help: <mailto:ask@pro.subscribe.ru>
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List-Archive: NO
List-Post: NO
Date: Wed, 28 Dec 2011 20:24:24 +0400