question

[Xavier <xa...@wanadoo.fr>]

Good evening,i have would liked to know what means the following message;i dont understand why i obtain this kind of
 message cause ,before to meet this problem,i could send messages to this address,without problem;it's possible that this contact block me? :
The SMTP Server program

<na...@hotmail.co.uk>: host pamx1.hotmail.com[65.54.247.8] said: 550
   Requested action not taken: mailbox unavailable (in reply to RCPT TO
   command)

but i know that this address exist cause i have managed already to send emails,and i know this adress is a MSN adress cause i have spoken(very little,cause she didnt reply,at the beginning) with this strange person,on MSN, 2 days ago,whereas this same email adress doesnt work anymore,only when i send an email,from wanadoo,or from msn: but i thought that it  was maybe(maybe i dream but not sure) a celebrity(cause i searched a MSN email of a particular celebrity,in fact)[ but like this address exist, do you know ,how does the personne(who is nataliemail) make to obtain this message and  block me? and me,if i wanted make the same,i could too?]  Thank you again,and excuse me for this desagreement, but this thing and this person intrigues me,really much.See you

PS:i wanted to know if it was possible that you could check her ip, for see to which real name ,this email(nataliemail) corresponds or if you coudn't, do you know how i could make ,to see to which real name that corresponds? to whom  I could address myself?   Thanks again