Problem scenario
You want to send more than one line of text as the body of an email. You want to use the command prompt of a RedHat Enterprise Linux server.
Solution
Prerequisites
You have installed mailx. If you need to do this, run this command: sudo yum -y install mailx
Procedures
1. Create the multi-line message that you want to send in a file. Call it foobar.txt.
2. Use this command:
cat foobar.txt | mail -s "placeSubjectHere" -r email@from.com destiny@destination.com
-replace "placeSubjectHere" with the subject of your email
-replace "email@from.com" with the email address that you want the email to appear to be from
-replace "destiny@destination.com" with the destination email address
3. The email should have been sent. You are done.
An Alternative Way To Send Email
Another way to do this is with Python; to learn how to use Python and not install anything else, see this external posting.