I have searched around the Internet and this forum, but I can't find a clear answer to a question I have.

I have received an e-mail on my Outlook.com account and received it on my iPhone 4 with the latest iOS. I slided the notification and it immediately opened and I read the message in the native iOS mail app (nothing strange here, just describing how I opened the message).

What I am wondering now is if the sender did requested a read receipt for this e-mail and is there a way to find out if it was sent?

TIA