How can i validate the authentication of an email?

I recently got an email forwarded to me that the sender says he originally sent to another employee. Is there a way I can verify whether he really sent the original email based on the email he forwarded to me?
occs07Asked:
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war1Connect With a Mentor Commented:
You need to look at the sender's computer and find the email and the header. That's the only way you can tell if sender really sent the message.
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Peter HartCommented:
if its simply attached at the bottom then - no it could easiely be faked.
I recently send an email cc'ing george Lucas at hollywood, my friend who it was to didn't eralise I simply made up thatemail address and infact it that cc bounced back.  like wise with the content it can be cut and pasted from anywhere
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war1Commented:
Hello occs07,

If sender included the full header, then you can tell whether he really sent or not sent the email.

Hope this helps!
war1
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occs07Author Commented:
Sender did not include full header. This person says that he sent an email to an employee but the employee swears up and down he never got it.
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occs07Author Commented:
Because I am unable to access the users computer that sent the original email, I am unable to authenticate the validity of the email in question.
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