email command in Linux mailx doesn't recognize the sender email syntax

Question

Passing a command into Unix, but the originator email is not been recognized...

Can someone tell me what is wrong with the syntax for mailx function , when I send this command it executes the mail , but the sender email is not correct

concat(' mailx -s "',  '-r [email protected]', subject_line ,'" -a$',output_file,' ', mailTo)