sudo apt-get install ssmtp

sudo -e /etc/ssmtp/ssmtp.conf

Root=your_email@gmail.com
Mailhub=smtp.gmail.com:465
RewriteDomain=gmail.com
AuthUser=your_gmail_username # me@gmail.com
AuthPass=your_gmail_password
FromLineOverride=Yes
UseTLS=Yes

sudo apt-get install heirloom-mailx

mail < filename.ascii someone@somewhere.com -s "My File"