Yes, when converting EMLX to PDF can preserve metadata like the sender, timestamp, and subject but it depends on the software you used. so you can use Dailysoft EMLX converter software. it is Supported to export one or many EMLX files to Personal Document Format at one time. this is an award-winning program to convert specific EMLX files to PDF. it is an advanced app to export an unlimited number of EMLX files to PDF. it provides a free demo trial before purchasing.