"I certainly felt ignored when a young editorial assistant at a magazine asked me to send important information to her but never acknowledged receipt of same. I waited 72 hours for her reply, and then sent the information again with a note saying, “Just re-sending in case you didn’t receive.” When another 48 hours elapsed without a reply from her, I resent the information again, this time appended, “I’m resending this because I have no way of knowing whether or not you received it.”"
This guy isn't too well-versed with technology is he.