from: Director General <firstname.lastname@example.org>
date: 11 February 2015 at 17:57
subject: Re: Your amazing silence!!
I wonder why you continue neglecting my emails. Please, acknowledge the receipt of this message in reference to the subject above as I intend to send to you the details of this project.
Sometimes, try to check your spam box because most of these correspondences fall out sometimes in SPAM folder.