It is against outlook.com policy to send mail from a machine which is an open proxy server, and it will be blocked from accessing some or all of outlook.com servers as long as it remains in that state. The outlook.com smart network data services (snds) gives you the data you need to understand and improve your reputation at outlook.com. Smartscreen® analyzes emails to help detect fraudulent links or spoofed domains to help protect users from these types of online scams.
Troubleshooting this section provides troubleshooting information for senders who are having trouble reaching outlook.com users by email. Therefore, we have established a suite of services to help senders improve their deliverability to outlook.com consumers by proactively managing their sending reputation. Deliverability to outlook.com is based on your reputation.
Senders attempting to send email to outlook.com users should ensure they fully understand and are following the guidance on this page to help in this effort and to help avoid potential deliverability issues. Outlook.com offer phishing protection as part of the patented smartscreen® filter technology. If you are an outlook.com user looking for support with your account, please visit our end user support page. Access your email, calendar, and contacts with outlook, microsoft's free personal information manager.