Sendmail适当的configuration

我有一个小型服务器（Ubuntu 14.04）多个网站。 其中一个网站需要通过各种操作（注册，密码恢复等）向用户发送电子邮件。 我安装了sendmail，我可以从PHP脚本发送邮件。

我configuration了SFP DNS条目。 我服务器的主机名是“橡皮”。 我的/ etc / hosts文件包含

127.0.0.1 localhost localhost.localdomain rubber public.ip.address rubber 

使用此configuration，发送电子邮件需要很长时间（大约20秒）。 另外，sendmail日志（/var/log/mail.log）显示如下一行：

 Sep 24 17:28:52 server sendmail[19842]: s8OFSLUd019842: to=<[email protected]>, delay=00:00:15, xdelay=00:00:15, mailer=relay, pri=30370, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (s8OFSbcl019844 Message accepted for delivery) 

收到的邮件标题看起来像这样（我已经改变了真实的地址）：

• 禁止sendmail中的.doc / .zip附件
• 确定sendmail无法发送的原因
• 什么是sendmail的“relay：”文本中使用的SMART_HOST值？
• 使用sendmail发送邮件到Gmail
• 如何将主机设置为特定IP子网的sendmail中继

 Delivered-To: [email protected] Received: by 10.112.136.195 with SMTP id qc3csp517582lbb; Wed, 24 Sep 2014 08:20:55 -0700 (PDT) X-Received: by 10.180.99.195 with SMTP id es3mr12425233wib.67.1411572055732; Wed, 24 Sep 2014 08:20:55 -0700 (PDT) Return-Path: <[email protected]> Received: from localhost.localdomain ([2022:4ff0:51:500::16e]) by mx.google.com with ESMTPS id el1si7235041wid.69.2014.08.22.08.20.55 for <[email protected]> (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Sep 2014 08:20:55 -0700 (PDT) Received-SPF: pass (google.com: domain of [email protected] designates 2022:4ff0:51:500::16e as permitted sender) client-ip=2022:4ff0:51:500::16e; Authentication-Results: mx.google.com; spf=pass (google.com: domain of [email protected] designates 2022:4ff0:51:500::16e as permitted sender) [email protected] Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by localhost.localdomain (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id s8OFKPU7019505 for <[email protected]>; Wed, 22 Sep 2014 17:20:40 +0200 Received: from website-test.com (www-data@localhost) by localhost.localdomain (8.14.4/8.14.4/Submit) with SMTP id s8OFKAOG019503 for <[email protected]>; Wed, 22 Sep 2014 17:20:25 +0200 X-Authentication-Warning: localhost.localdomain: www-data owned process doing -bs Message-ID: <[email protected]> Date: Wed, 22 Sep 2014 17:20:09 +0200 Subject: Test email From: "Website.com" <[email protected]> To: [email protected] MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 

我的问题是：

1. 如何让sendmail服务器更快地发送邮件？ 什么要花这么长时间？
2. 我怎样才能摆脱像localhost.localdomain和本地服务器的用户名这些“个人头”？