You are right, I figured out the messages were been sending for two unknowing e-mail address. So I blocked these address e-mails on my server provider and the messages disappeared.
Thanks
I started having the same problem and I don't have idea how to solve it.
I changed my password, turn of completely the ipad2 and my computer at the same time but I still continue receiving such messages.
If anyone have any hint please help us!
I lived in Brazil and use http://www.unblock-us.com as DNS server. So I have changed my router DNS and all my wi-fi connection is working fine for Netflix (PS3, Wii, iPad2, AppleTv).