The email address ReCipiENt@eXaMPle.cOm is indeed different from recipient@example.com (but it the same as ReCipiENt@example.com).
Adreesị ozi-e ReCipiENt@eXaMPle.cOm dị iche na recipient@example.com (ma ọ bụ otu ihe ahụ dị ka ReCipiENt@example.com).