我在我的 VPS 上设置了一个 POSTFIX 服务器，通过它发送的邮件将被发送到 gmail 中的垃圾邮件。这是我的留言：
Delivered-To: sgenov@gmail.com
Received: by 10.140.43.75 with SMTP id d69csp350632qga;
Mon, 19 Jan 2015 15:29:29 -0800 (PST)
X-Received: by 10.194.89.39 with SMTP id bl7mr6149887wjb.76.1421710169272;
Mon, 19 Jan 2015 15:29:29 -0800 (PST)
Return-Path: <kalina@hotelfors-bg.com>
Received: from mail.sgenov.com (mail.sgenov.com. [192.81.221.174])
by mx.google.com with ESMTP id j9si29338582wjy.109.2015.01.19.15.29.28
for <sgenov@gmail.com>;
Mon, 19 Jan 2015 15:29:29 -0800 (PST)
Received-SPF: pass (google.com: domain of kalina@hotelfors-bg.com designates 192.81.221.174 as permitted sender) client-ip=192.81.221.174;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of kalina@hotelfors-bg.com designates 192.81.221.174 …