被微软退信，邮件服务器IP在其系统的拦截列表S3140中，解除这个黑名单限制的方法，可点击这里快速跳转到下文。
前段时间，甲骨文推出了4+24永久免费的ARM机器，一时间令人难以置信，啥？4核+24G内存VPS，还永久免费？我也直呼，不可能吧！！事实证明，在使用了近2月，仍没被收费，仍然在免费使用的我：“牛逼！”
这免费的VPS，尽管强大，但是随时可能被收回使用权限，那么用来做什么好呢？自建邮局！Eluyee在一台2+12的甲骨文VPS上搭建了iRedMail邮件服务器。
邮件服务器IP被列为微软拦截黑名单S3140
在我搭建好邮件服务器之后，在mail-tester.com和一些网站上，测试发出邮件评分，得分满分10分，邮局搭建成功，没问题！然而，在使用了一小段时间，再给微软的邮箱发信，就直接被退信！原因是邮件服务器IP在他们的拦截名单上。
只要是发送到与微软域名（包括不限于hotmail.com，live.com，msn.com，outlook.com）相关的邮箱或使用了他们拦截系统的邮箱，都被退信，服务器返回信息如下：
outlook-com.olc.protection.outlook.com[104.47.12.33] said: 550 5.7.1
Unfortunately, messages from [140.238..] weren’t sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
[DB3EUR04FT029.eop-eur04.prod.protection.outlook.com]
后面我注册了微软的Smart Network Data Services – 智能网络数据服务，查看到是因为有人把我发送的邮件拉进了垃圾邮件里，或被投诉？我无语啊，真是这样吗？我还没给人发送过无关的邮件，更不要说垃圾邮件了。
下图是邮件服务器IP正常状态时显示的内容
Smart Nerwork Data Services项目里有一个Junk Email Reporting Program – 垃圾邮件报告计划，提供这些好处：
- 提供有关 Outlook.com 用户报告的垃圾邮件问题报告的免费服务
- 返回任何被标记为 “垃圾 “或 “网络钓鱼 “的电子邮件的完整信息及标题
- 为发件人提供清理电子邮件列表和提高内容质量的机会
- 帮助识别营销实践和内容的潜在问题
- 通过从列表中删除不需要的订阅者来帮助提高发件人的声誉
IP拦截、被退信解决办法
联系微软邮局客服，他们有工具和权利去解除IP拦截。你可直接通过这个链接https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75，发起工单请求。
填写如下信息（仅供参考）
Describe the issue
Issue Title
Undelivered Mail Returned to Sender
Sender Information for Outlook.com Delivery
Contact Name:
Luyee
What domain are you sending to?
outlook.com
Contact e-mail address (this email must be valid to receive the investigation report):
admin@eluyee.com
Time Zone
(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi
What domain are you sending from?
eluyee.com
How would you describe your company or yourself?
Social Networking
Please provide the following information:
Outbound IP(s) or range(s): *
你的邮件服务器IP地址
Is your server dedicated or shared?
Dedicated
Copy and paste any error messages:
把退信的完整信息复制粘贴到框里
Provide the URL of your web site:
https://www.eluyee.com/
填写验证码并提交。
大约几小时后收到第一封邮件：
Reported deliverability problem to Outlook.com SRX152***4340ID
Dear Luyee
Please note that your ticket number is in the subject line of this mail.
140.238..
Note: Errors are unlikely, however, if an error is indicated, please resubmit the specific IP or IP range.
Thank you,
Outlook.com Deliverability Support
Please do not reply to this message as it is from an unattended mailbox. Any replies to this email will not be responded to or forwarded. This service is used for outgoing emails only and cannot respond to inquiries.
随后还有第二封邮件：
Dear Luyee
We have completed reviewing the IP(s) you submitted. The following table contains the results of our investigation.
Conditionally mitigated
140.238..
Our investigation has determined that the above IP(s) qualify for conditional mitigation. These IP(s) have been unblocked, but may be subject to low daily email limits until they have established a good reputation.
Please note that mitigating this issue does not guarantee that your email will be delivered to a user’s inbox.
Ongoing complaints from users will result in removal of the mitigation.
Mitigation may take 24 – 48 hours to replicate completely throughout our system.
If you feel your issue is not yet resolved, please reply to this email and one of our support team members will contact you for further investigation.
Regardless of the deliverability status, Outlook.com recommends that all senders join two free programs that provide visibility into the Outlook.com traffic on your sending IP(s), the sending IP reputation with Outlook.com and the Outlook.com user complaint rates.
Junk Email Reporting program (JMRP) When an Outlook.com user marks an email as “junk”, senders enrolled in this program get a copy of the mail forwarded to the email address of their choice. It allows senders to see which mails are being marked as junk and to identify mail traffic you did not intend to send. To join, please visit
https://sendersupport.olc.protection.outlook.com/snds/JMRP.aspx
Smart Network Data Services program (SNDS). This program allows you to monitor the ‘health’ and reputation of your registered IPs by providing data about traffic such as mail volume and complaint rates seen originating from your IPs. To register, please visit http://postmaster.live.com/snds/.
There is no silver bullet to maintaining or improving good IP reputation, but these programs help you proactively manage your email eco-system to help better ensure deliverability to Outlook.com users.
Thank you,
Outlook.com Deliverability Support
收到这封邮件，即代表客服已经帮助解除IP拦截了。这篇文章中介绍的解决方法只是有可能解决问题，具体还得看他们对你发出邮件的调查情况，又或许你能够跟他们解释清楚也是可以解决邮件退信的。
按邮件提示，IP拦截解除可能需要24-48小时生效。Luyee在1天后给自己的outlook邮箱发送邮件，成功送达收件箱了！当然，发送到Gmail，QQ等这些邮箱也都能够进收件箱，就是微软家风控有些变态。
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