Send a simple message from the command-line

Need to send yourself or someone else a quick email from the Linux command-line?  Use mutt.  First I compose the message in a file, e.g. msg.txt.  Then cat it, and invoke mutt.  The example below also includes an attachment – a  python script I was sending myself.

cat msg.txt | mutt -s "version 2.0" -n -a

-n – bypass the system configuration
-s – subject
-a – attach a file

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