Sending mail using 'mutt' from shell

In my opinion, 'mutt' is the best text-based Email client for sending mails with Attachment from Linux shell. The best part with it is, it supports wide variety of MIME ("Multipurpose Internet Mail Extensions") types, which ensures the integrity of various types of attachments such as Binary, jpeg, mp3 files.

Below shown are few command sets for sending mails using Mutt with following specifications.

To address: rdashokraj@yahoo.com

Subject: Test mail

Attachment filename:  song.mp3

Message body:  "This mail has a mp3 attachment"

With attachment:

# echo "This mail has a mp3 attachment" | mutt -s "Test mail" -a song.mp3 rdashokraj@yahoo.com

# mutt -s "Test mail" -a study.dat rdashok@outlook.com < messagefile 

Note: "messagefile" is the filename that contains the message body "This mail has a mp3 attachment"

Without attachment:

# echo "Mail without attachment" | mutt -s "Test mail" rdashok@outlook.com

Without Message body:

# mutt -s "Test mail" -a study.txt rdashok@outlook.com < /dev/null