i recieved an email from [e-mail] does anyone know who this is or is it valid?

Answer 1

Well I did a 'whois' search and it says there is no domain registered under that URL, so it seems unlikely to be valid. Try to go to the site unvisia.com.br and see if it exists.

Universal whois: http://www.uwhois.com/cgi/domains.cgi?User=NoAds

The answer to your domain search is
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unvisia.com.br Name not found