Sendmail

Knowledge

/usr/sbin/sendmail -t < filename.eml

cat << EOF | sendmail -t 
Sender: [email protected]
From: Sender <[email protected]>
Reply-To: Sender <[email protected]>
To: To <[email protected]>
CC: Cc <[email protected]>
Disposition-Notification-To: [email protected]
Subject: Generic Subject

Generic Body
EOF

References

Sending mail from a Bash shell script Sending a mail from a shell script Reply-To header to send emails Sendmail Attachment