Emails sent to hotmail.com, live.com, msn.com, outlook.com are returned with an error.

Category：Web Server

Pub.date：2021-01-10

It seems that it is registered in the BLOCK LIST of hotmail.com, live.com, msn.com, outlook.com, so the procedure to apply for cancellation.

## Received error email

This is a MIME-encapsulated message.

This is the mail system at host (Server domain). 
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. 
For further assistance, please send mail to postmaster.

If you do so, please include this problem report. 
You can delete your own text from the attached returned message.

The mail system

<(Destination)>: host apc.olc.protection.outlook.com[104.47.125.33] said: 550 5.7.1 Unfortunately, messages from [(Source IP)] 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 <a href="http://mail.live.com/mail/troubleshooting.aspx#errors" target="_blank">http://mail.live.com/mail/troubleshooting.aspx#errors</a>. 
[SG2APC01FT020.eop-APC01.prod.protection.outlook.com] (in reply to MAIL FROM command)

## Block list release application

Apply for block list cancellation from this form. 
<a href="https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75" target="_blank">https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75</a>

## Reception completion email

After a while, you will receive an email to the effect that the reception has been completed.

```
Dear (name)
Please note that your ticket number is in the subject line of this mail.
(IP address for which permission was applied)
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.
```

## When the release from the BLOCK LIST is refused

Unfortunately, if the cancellation request is rejected, you will receive the following email.

```
Dear (name)
We have completed reviewing the IP(s) you submitted. The following table contains the results of our investigation.
Not qualified for mitigation
(IP address for which cancellation was requested)
Our investigation has determined that the above IP(s) do not qualify for mitigation.
Please ensure your emails comply with the Outlook.com policies, practices and guidelines found here: http://mail.live.com/mail/policies.aspx.
To have Deliverability Support investigate further, please reply to this email with a detailed description of the problem you are having, including specific error messages, and an agent will contact you.
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 http://support.msn.com/eform.aspx?productKey=edfsjmrpp&page=support_home_options_form_byemail&ct=eformts.
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
```

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