Below is part of the Microsoft Services Agreement. The remainder can be read at the below link. I'm posting this with the hopes there should now be no need to try to decipher which emails are fake and which are real, when it can be read in full here
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Updated August 27, 2012
Effective September 27, 2012
IF YOU LIVE IN THE UNITED STATES, SECTION 10 CONTAINS A BINDING ARBITRATION CLAUSE AND CLASS ACTION WAIVER. IT AFFECTS YOUR RIGHTS ABOUT HOW TO RESOLVE ANY DISPUTE WITH MICROSOFT. PLEASE READ IT.
Thank you for choosing Microsoft!
This is an agreement between you and Microsoft Corporation (or based on where you live one of its affiliates) that describes your rights to use the software and services identified in section 1.1. For your convenience, we have phrased some of the terms of this agreement in a question and answer format. You should review the entire agreement because all of the terms are important and together create a legal agreement, once accepted by you, that applies to you.
1. Scope of agreement, acceptance, and changes
1.1. What services are covered by this agreement? This agreement applies to Microsoft Hotmail, Microsoft SkyDrive, Microsoft account, Windows Live Messenger, Microsoft Photo Gallery, Microsoft Movie Maker, Microsoft Mail Desktop, Microsoft Writer (the foregoing are collectively referred to as the "Microsoft branded services"), Bing, MSN, Office.com, and any other software, website, or service that links to this agreement (collectively the "services").
1.2. What terms must I abide by when using the services? Our goal is to create a safer and more secure environment and therefore we require that, when using the services, users abide by these terms, the Microsoft Anti-Spam Policy (http://go.microsoft.com/fwlink/?LinkId=117951) and the Microsoft Code of Conduct (http://g.live.com/0ELHP_MEREN/243), which are incorporated into this agreement by this reference (the "agreement").
1.3. How do I accept this agreement? By using or accessing the services, or by agreeing to these terms where the option is made available to you in the user interface, you agree to abide by this agreement without modification by you. If you do not agree, you may not use the services.
1.4. Can Microsoft change these terms after I have accepted them? Yes. From time to time, Microsoft may change or amend these terms. If we do, we will notify you, either through the user interface, in an email notification, or through other reasonable means. Your use of the services after the date the change becomes effective will be your consent to the changed terms. If you do not agree to the changes, you must stop using the services and cancel any paid services by following the instructions in section 9.10. Otherwise, the new terms will apply to you.
1.5. What types of changes can I expect to the services? We continuously work to improve the services and may change the services at any time. Additionally, there are reasons why Microsoft may stop providing portions of the services, including (without limitation) that it's no longer feasible for us to provide it, the technology advances, customer feedback indicates a change is needed, or external issues arise that make it imprudent or impractical to continue. We may release the services or their features in beta version, which may not work correctly or in the same way the final version may work.
Continued : http://windows.microsoft.com/en-US/windows-live/microsoft-services-agreement