echo -e To: 'The Persons Name
' \\n\\n Body of mail \ | /usr/sbin/sendmail -F "From Name" \ -f email@example.com -t firstname.lastname@example.org
Where -e says I want to interpret \\n as a newline.
-F is the from description
-f is the from address
-t is the to address
export MYVAR=Hello echo -e To: "I\'m A loser baby
"\ \\nSubject: 'A test subject'\\nX-Custom-Header: \ \"$MYVAR My custom Header with escaped double quotes allow variable interpolation\"\ \\n\\n Body of mail | /usr/sbin/sendmail -F "Send Me A Winder" \ -f email@example.com -t firstname.lastname@example.org