A. Junk Email
B. Trash
C. Spam
D. Bounced Mail

Solution

D. Bounced Mail

Explanation

An email message that has failed to reach its destination is called a bounce or bounce-back. This occurs when the email cannot be delivered to the recipient's email server for various reasons, such as an invalid email address, a full mailbox, or technical issues with the recipient's email server. Email servers typically generate a bounce message or bounce notification to inform the sender that the email could not be delivered.