Question: what are the 4 main parts of an email message?
Answer: Subject. Subject is a description of the topic of the message and displays in most email systems that list email messages individually. ... 
Sender (From). This is the sender's Internet email address. ... 
Date and time received (On). ... 
Reply-to. ... 
Recipient (To:). ... 
Recipient email address. ... 
Attachments.