emails were rejected by outlook.com

Question

Hi,

Lately our emails were rejected by outlook.com. We don't have any issue sending emails to other domains. We used several online tools to check our ip addresses and they came out clean. We also asked our ISP to check as well and they all also came out clean; no blacklisted.

Following is the error message we got from Microsoft:

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CO1NAM11FT003.mail.protection.outlook.com rejected your message to the following email addresses:
someone@harsh.com .com (someone@harsh.com .com)

Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept email from certain senders, or another restriction may be preventing delivery.

CO1NAM11FT003.mail.protection.outlook.com gave this error:
Unfortunately, messages from [168.220.222.50] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM11FT003.eop-nam11.prod.protection.outlook.com]

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We emailed Microsoft support and they replied with the following. I'm afraid to make any change just to comply with Microsoft and mess up other things because at this point, we don't have any issue with other domains. Any comment and suggestion will be greatly appreciated.

Thanks

Tee

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Not qualified for mitigation
168. 220.222.40; 168.220.222.50
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.

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.

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Answer 1

Outlook.com (hotmail) is not currently supported here on QnA. They're actively answering questions in dedicated forums here.
https://answers.microsoft.com/en-us/outlook_com/forum/oemail

--please don't forget to Accept as answer if the reply is helpful--

Answer 2

I recieved the same message. is this because the business email itself doesn't follow the rules of outlook? or what could it be? I wanted to run a test between my main email and this business email. It did not send and I received the same exact message. please help.

Answer 3

DanielFaatz-5357

I contracted Microsoft hotmail and outlook devision to remove our mail server ip address from their spammer list. For some reason, our ip was getting filtered by their system.

Hope this helps.