email "Payment Thank-You"

email "Payment Thank-You"

Hi, 
help me, please. I can't sent email "Payment Thank-You". Going to "contacts"->choosing customer->"new transaction" -> invoice payment, fill the payment recieved i see "Email To" and e-mail adresses with checkboxes. 


I choose e-mails, including my e-mail, but I don't recieve nothing, and I presume that others too. 
Please tell what is the reason