Make Tech Easier published a tutorial about sending an email from Linux terminal.

How to Send Email From the Linux Terminal

The Linux terminal gives us the power and capacity to perform tons of tasks with a few keyboard strokes. For those who spend most of your time in the terminal, you can also send email directly from the Terminal. This guide takes you by the hand and shows you how you can use various methods and tools to send email straight from the Linux terminal. Related: How to Set Up Git Username and Email in Ubuntu Note: To send email from the terminal, ensure you have a mail server set up and working correctly. 

How to Send Email From the Linux Terminal