That is, the command "RCPT TO:" requests Outlook.com's servers to respond with whether it will accept mail for example@hotmail.com, information which is invaluable to spammers trying to compile recipient lists for future spamming., This site provides information to information technology professionals who administer systems that send email to and receive email from Outlook.com. It also provides some information about how users with Outlook.com accounts can report junk email and phishing attempts. However, it is not intended to provide extensive support to Outlook.com users. If you are an Outlook.com user in need of , To report unlawful, abusive, unwanted or malicious email that you find originating from an Outlook.com, Hotmail, Live, or MSN account, please forward a complete copy of the abusive message (including the full message header) to abuse@outlook.com. Sending these types of communications is a violation of Microsoft policy and appropriate action , Fighting Junk Email Microsoft's email safety roadmap involves an unmatched cross-product approach. SmartScreen® anti-spam and anti-phishing filtering technology is being applied across Microsoft's email platforms to provide customers with the latest anti-spam and anti-phishing tools and innovations throughout the network. These products include Outlook.com, Exchange, Office 365, and more. The , Currently, the addresses for these servers are mx1.hotmail.com, mx2.hotmail.com, mx3.hotmail.com and mx4.hotmail.com. If that doesn't work, try connecting directly to the IPs., Outlook.com Outbound IP Space Outlook.com sends e-mail from the following IP addresses: 40.92.0.0/14.