Why Is mail.facebook.com Pointing To An Outlook Web App Login?

This whole Facebook Mail thing is getting curiouser and curiouser. After our post on Facebook taking control of fb.com, a number of people have reached out to say that mail.fb.com actually resolved to mail.thefacebook.com (that doesn't seem to be the case for all people). What's interesting about that is that mail.thefacebook.com (and mail.facebook.com) is live for all to see. It's an Outlook Web App with a nice big Facebook logo that asks you for a username and password.

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