Answer:
Option D
Step-by-step explanation:
the To Box: This box contains the email id of the receiver to whom we send the mail.
the Subject Box: This box contains the subject of the email.
the Body Box: This box contains the content of the email.
the Out Box: This is a folder section that contains the messages that are not sent due to some network issues.
Hence ,
option a , b, c are the part of email message form whereas option d is not a part of email message form.