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Let's say an email is sent from party A to B. Let's refer to the set of headers that B views as Headers 1. Party B then replies to or forwards the email to party C. Let's refer to the set of headers that C views as Headers 2. Does any information from Headers 1 persist separate from or as a part of Headers 2?

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marked as duplicate by TheCleaner, voretaq7 Jul 23 '13 at 18:00

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Downvoted because asked elsewhere? –  Robert Jul 23 '13 at 20:19
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up vote 2 down vote accepted

No. SMTP Has no concept of forwarding. You basically send a new email. And that is technically correct - after all, you send the new text to your email server.

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this seems to conflict with the answer at serverfault.com/questions/163160/… which indicates the answer is implementation-specific... ? –  Robert Jul 23 '13 at 20:19
    
No. Read that again. The CLIENT (MUA) ma decide to include the old headers in the new email. But that is not part of the SMTP protocol. A SMTP Server wont delete them. If that happens, it is totally a client functionality. –  TomTom Jul 24 '13 at 3:09
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