Thanks for your response. Actually, I'm the one sending the text messages to my son who has an iPhone 5. I wasn't able to discover if he has blocked my text messages sent from my pc email to his ##########@vtext.com because I am getting no response from him. I couldn't discover if I would receive a notification of some kind if he had, in fact, blocked my messages. I was hoping if someone with an iPhone 5 could tell me if there would be some notification that goes back to the pc that sent a message using the @vtext.com route should this be blocked by the iPhone recipient. I gather there is some kind of notification. I would just like to know for certain that I haven't been blocked using the pc route. Thank you for the information you sent me, though, and for the time you took to respond to my query.