Suppose you choose to export an object from Access to Email. When you preview the message in Outlook, the attachment does not appear in the attached line of the message.
This problem occurs on a Microsoft Office 2016 Click-to-Run installation that has at least the December 11, 2015 update (version 16.0.6366.2036) installed. See KB 3132071 for more information and the current status of the issue.
An attachment does not appear in a Plain Text message in Outlook 2016