II0-001 · Question #153
All are common email headers except?
The correct answer is B. X-Receiver. X-Receiver is not a recognized standard email header - headers prefixed with X- are by convention non-standard, custom, or experimental extensions added by specific mail servers or clients, not part of the core email specifications (RFC 5322). Bcc (Blind Carbon Copy) is a…
Question
All are common email headers except?
Options
- ABcc
- BX-Receiver
- CErrors-To
- DMime-Version
How the community answered
(19 responses)- A5% (1)
- B74% (14)
- C11% (2)
- D11% (2)
Explanation
X-Receiver is not a recognized standard email header - headers prefixed with X- are by convention non-standard, custom, or experimental extensions added by specific mail servers or clients, not part of the core email specifications (RFC 5322).
Bcc (Blind Carbon Copy) is a standard header used to send copies to recipients whose addresses are hidden from other recipients. Errors-To is a standard header specifying where delivery error notifications should be sent. MIME-Version is a required standard header (from RFC 2045) that declares the MIME protocol version, enabling attachments and rich content in emails.
Memory tip: Watch for the X- prefix - in email standards, X- marks extension headers that aren't officially standardized, making any X-Something header a strong candidate for "not a common header" on an exam.
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