How to send mail via commandline and utilize mutt to send attachment

 To send a simple mail from command, follow the steps below:

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root@newserver [~]# mail user@domainname.com
Subject: test mail
test mail from support
.
EOT
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Use a "."  dot to end the mail.

Note: Use "mail -v  user@domainname.com" to get verbose output.

 Now, the important point that we have to see is how this is helpful while writing a shell script.

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echo "This is the message body" | mail -s "This is the subject" user@domainname.com
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The above command is very useful while writing shell scripts to send mails.


Now, we can also utilize this in other way. By adding the content of a file as body to the mail.
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 mail -s "Hello World" user@domain.com < /home/user/mailcontent.txt
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In the  above example the contents of the file will be the body of the mail.

Other useful parameters in the mail command are:
-s subject (The subject of the mail)
-c email-address (CC - send a carbon copy to email-address)
-b email-address (BCC - send a blind carbon copy to email-address)

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mail -s "Hello World" user@domain.com -c usertocc@domain.com -b usertobcc@domain.com
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It has always been a question how to specify multiple recipients while sending mail, this can be done by joining them with a comma.


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mail -s "Hello" user1@domain.com,user2@domain.com 
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Setting the "FROM" address during sending mails from command line is easy but a little bit tricky.
The trick is : after the mail you want to send to, you add
(double dash) (space) (single dash) (NO space) f
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mail -s "Hello World" user@domain.com -- -f from_user@domain.com
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However, the above will work on centos, but not on debian or ubuntu. On ubuntu/debian system an alternative syntax has to be used
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 echo "This is the message body" | mail -s "This is the subject" user@domain.com -aFrom:blog@maninmanoj.com
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Sending attachment using mutt:

First install mutt using yum in Centos and in Ubuntu use apt-get  


Centos:
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yum install mutt
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Debain/ Ubuntu:
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apt-get install mutt
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Command:
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mutt -s "hello"  maninmanoj@gmail.com  -a /root/test.sh.tar.gz
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-a ==> stands for attachment

Send mail with bash/shell scripts
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#!/bin/bash
df -h | mail -s "details of partition" user@domain.com
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Open a new file and add the lines above to that file, save it and run on your box.  You will be getting the report of  partitions and disk usage in a server as mail.