I use my email frequently and most likely have a lot in storage.  Is there a way to upgrade my account to a better one?

Please advice.
Tea

I have a domain that hotmail is rejecting sending mail to with 5.5.0 "no such user" except the Returning-MTA is Hotmail, not the MX record for the domain (which I have access to and see no connections from hotmail)

How do I determine why Hotmail is rejecting sending to this domain or the MX record it is using?

Recently when I open hotmail I have to confirm my personal info. I've done it several times and today got an email with a link demanding I update again. Is it really from hotmail team or a spam to break into my account?
I am signed in to Hotmail, and have received the above, email from "hotmail.Team.ID-56870" requesting I sign in and give additional info.  I will not respond unless I know it's really from Microsoft.  What should I do?
I received an email from Hotmail.Te​aml.ID-3314​.uk@wlive-h​ot.msg.ju4n​e.udae.micr​osoft-smart​start-tech.​co.uk




stating that I have to "activate" my account...is this a legit email or not?
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received email, from window live supposedly, and want to make sure is them for reals, this is the address :Hotmail.Te​aml.ID-2371​.uk@wlive-h​ot.msg.ju0n​e.qsjr.micr​osoft-smart​start-tech.​co.uk
I have tried every way possible through the MSN directories and can't recover my blocked hacked account.  I do not recall what my old alternate email is. 
My email that is blocked is *** Email address is removed for privacy ***   I have a bit of information there that I dont want to lose.