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  3. Reading email headers

Reading email headers

  • What are email headers?
  • How can I see the headers of a message?
  • Why was this message held as spam?
  • Why wasn't this message held as spam?
  • Why did this message take so long to arrive?
  • What is SMTP?
  • What email headers does Pobox add?
  • How to read email timestamps (date and time entries)
  • What is an envelope sender?
  • What are Received: headers?
  • The elements of a Received: header
  • About forging Received: headers
  • Why do so many headers start with X-?
  • I'm getting 2 copies of every message. Who is duplicating it?
  • SPF, SRS rewriting and how it affects forwarding email
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