Ubuntu - Email - Sending a mail in the shell

mail -s 'subject' -c 'cc-address' -b 'bcc-address' 'to-address'

Press CTRL+D you are finished writing the mail.

Example

# mail the text that was piped to mail
echo "mail text" | mail john@example.com -s "subject text"
 
# mail the file content
cat list.txt | mail john@example.com -s "sample subject"