Use form at http://go.microsoft.com/fwlink/?LinkID=614866
Use SCS’s @outlook.com as contact email address.
Enter IPs as
18.104.22.168 22.214.171.124 126.96.36.199 <Customers IP address>188.8.131.52;184.108.40.206;220.127.116.11;<Customers IP address>
You’ll get a message back eventually with a subject of Reported deliverability problem to Outlook.com XXXXXXXXXX and a message of
Dear XYZ Please note that your ticket number is in the subject line of this mail. 18.104.22.168 22.214.171.124 126.96.36.199 <Customers IP address> 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.
Sit back and await their response.