我希望这个问题在这里有效，如果不是，我很抱歉。
我有一个 VPS 服务器，使用 PowerMTA 和 InterSpire 设置，我刚购买了服务器，然后让“专家”设置了其余部分。VPS 满足常规电子邮件服务器设置的所有要求，例如所有端口都打开和 rDNS。
现在我的问题是，每当我尝试创建电子邮件活动并对其进行测试时，都会将其发送到我自己的 hotmail 和 gmail 帐户。电子邮件直接进入垃圾邮件文件夹。我知道我的 IP 是干净的，因为我已经测试过它们，我知道电子邮件内容不是垃圾邮件，因为我也测试过它 100% 清晰。但后来我在某处读到，问题往往出在 SMTP 设置上。我对不同的 SMTP 端口略微熟悉，知道通常的端口是端口 25。但是我的服务器上设置的一个端口是端口 457，我从未听说过，在 Google 上搜索时也找不到任何相关信息。
“专家”告诉我设置已正确完成，但我有疑问，想确认一下这个端口号。
下面是 Hotmail 电子邮件源代码，该邮件被归类为垃圾邮件
Received: from CY1NAM02HT172.eop-nam02.prod.protection.outlook.com
(2603:10a6:3:1a::14) by HE1P190MB0348.EURP190.PROD.OUTLOOK.COM with HTTPS via
HE1PR0501CA0004.EURPRD05.PROD.OUTLOOK.COM; Wed, 11 Oct 2017 22:33:29 +0000
Received: from CY1NAM02FT036.eop-nam02.prod.protection.outlook.com
(10.152.74.52) by CY1NAM02HT172.eop-nam02.prod.protection.outlook.com
(10.152.74.224) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.20.77.10; Wed, 11
Oct 2017 22:33:28 +0000
Authentication-Results: spf=none (sender IP is 000.00.000.00)
smtp.mailfrom=domain.com; outlook.com; dkim=none (message not signed)
header.d=none;outlook.com; dmarc=none action=none header.from=domain.com;
Received-SPF: None (protection.outlook.com: weagill.com does not designate
permitted sender hosts)
Received: from api7.mydomain.com (000.00.000.00) by
CY1NAM02FT036.mail.protection.outlook.com (10.152.75.124) with Microsoft SMTP
Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id
15.20.77.10 via Frontend Transport; Wed, 11 Oct 2017 22:33:28 +0000
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To: <[email protected]>
Subject: Test Email System
Message-ID: <[email protected]>
Return-Path: [email protected]
Date: Wed, 11 Oct 2017 22:33:27 +0000
From: <[email protected]>
Reply-To: <[email protected]>
Content-Type: text/plain; format=flowed; charset="UTF-8"
Content-Transfer-Encoding: 8bit
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MIME-Version: 1.0
Hi,
This is a test of the emailing system. If you received this ok, then
everything is working as it should.
答案1
要接收互联网电子邮件，SMTP 服务器需要监听端口 25，但您的服务器接受的端口号以及您在邮件客户端中配置的用于发送电子邮件的端口号并不十分相关，TCP端口 587（或者尽管已弃用 465) 更为常规，但并不比 457 更好或更差。
您发布的标题：
Authentication-Results: spf=none (sender IP is 000.00.000.00)
smtp.mailfrom=domain.com; outlook.com; dkim=none (message not signed)
header.d=none;outlook.com; dmarc=none action=none header.from=domain.com;
Received-SPF: None (protection.outlook.com: weagill.com does not designate
permitted sender hosts)
表明您的外发邮件服务器和域都尚未完全配置。