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312-49 · Question #610

Which of the following email headers specifies an address for mailer-generated errors, like "no such user" bounce messages, to go to (instead of the sender's address)?

The correct answer is D. Errors-To header. The 'Errors-To' email header specifies an alternative address where mailer-generated error messages (such as bounce-backs, non-delivery reports, or 'no such user' messages) should be sent, rather than going to the From address. This is commonly used in bulk mailing systems to…

Submitted by alyssa_d· Apr 18, 2026Network Forensics

Question

Which of the following email headers specifies an address for mailer-generated errors, like "no such user" bounce messages, to go to (instead of the sender's address)?

Options

  • AMime-Version header
  • BContent-Type header
  • CContent-Transfer-Encoding header
  • DErrors-To header

How the community answered

(24 responses)
  • A
    8% (2)
  • C
    4% (1)
  • D
    88% (21)

Explanation

The 'Errors-To' email header specifies an alternative address where mailer-generated error messages (such as bounce-backs, non-delivery reports, or 'no such user' messages) should be sent, rather than going to the From address. This is commonly used in bulk mailing systems to redirect error handling to a dedicated address. The other headers serve different purposes: MIME-Version indicates the MIME protocol version used, Content-Type specifies the media type of the message body (e.g., text/html), and Content-Transfer-Encoding describes how the message body is encoded (e.g., base64, quoted-printable).

Topics

#Email headers#Email protocols#Bounce messages

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