If the line starting with 'From: ' has no sender's address on it, fill in the missing information.
The second line in the message file starts with 'To: ', and needs to be completed with the name and address of the recipient.
The third line in the message file starts with 'Subject: ', and needs to be completed with a description of the message contents.
Remember to keep at least one empty line between the message header and the body text, and at least one space or TAB character between the colon following each keyword and the rest of the line.