Hi, I received a message from someone who has his settings so that you can not send him a message, unless you are his friend. For a month we messaged back and forth, The last message in this thread was in January. I recently (July 12) sent a him a message from the message discussion thread from January, and I received the message:email@example.com
Mail Delivery Failure Based on the preferences of the person you're trying to contact, this message could not be delivered..
My question is, was this person able to see that I attempted to send a message, and if he has his settings set to receive email notifications of messages, did he get a notification of that message, even though it was sent back to me as a failed message.