Samsung Galaxy S8 / S8+ - Compose and Send Email Message

From a Home screen, touch and swipe up or down to display all apps.
These instructions apply to Standard mode and the default Home screen layout.
Tap Email .
Tap the Compose icon (lower-right).
From the To field, enter the recipient's email address.
As the recipient's email address or name is entered, a list of matching contacts may appear and can be tapped at any time.
From the Subject field, enter a subject.
From the lower field, enter a message.
To add an attachment:
1. Tap the Attach (upper-right).
2. Locate then tap the appropriate attachment.
Tap the Send icon (upper-right).