Many people are asking me if they should use @mac.com or @me.com..it must be showing up both ways lately.  I have always used @mac.com  Any thoughts???
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Apple would probably prefer that we stop using @mac but they've not pulled the plug yet.  They are the exact same thing @me an @mac.  So you're not loosing anything.  It's a matter of changing some things around in your mail preferences if you want to stick with @mac.  Just remember, Apple may one day decide they are tired of having their product name in your email address.  It's sort of like scotty@iphone.com.  They wouldn't allow that and would like to kill @mac I'm guessing.  

They paid a lot of money for www.me.com so I assume they are going to push us all to @me.com eventually so get ready.