What Does This Means ?

[SIRUS3001]

Reporting-MTA: dns;blu0-omc3-s14.blu0.hotmail.com
Received-From-MTA: dns;BLU106-W55
Arrival-Date: Mon, 11 May 2009 19:03:17 -0700

Final-Recipient: rfc822;*****Recipient Email*******
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 Requested action not taken: mailbox unavailable

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Does This Means That The Specific Email Address that i Mailed Does Not exists ? ? ?

 

[nj542]

yap....
looks like it....
ether it does not exist or u typed the address wrong....

 

[SIRUS3001]

yap....
looks like it....
ether it does not exist or u typed the address wrong....

I didn't Typed it Wrong, I Just Replied a Mail that i got. ..that's all
HOLY SHIT!!!!!That Meanz.................. OMG!