How to Send a File via Outlook 2013
Click the Send as Attachment button.
The New Message form appears with your document listed on the Attached line. If you want to type a message in the main part of the screen you can, but it isn't necessary.
Whew! When you're just sending one Word file, these steps seem like a long way to go, but they'll always get your document on its way. For some reason, the folks at Microsoft made this task more laborious as the years have passed.