determining the email addr from POP3 server

How do you determine the email address of the person who mailed you using POP3 *directly*??? I want to determine the email addr from the message headers or however you do it so I can then reply to the message using SMTP... I am using a CGI script to do this and have stumbled across this "replt to who" problem.
mramsayAsked:
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ramsayConnect With a Mentor Commented:
should be in the headers in the "From:" field after name
u might have been stumped by <> tags in html

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mramsayAuthor Commented:
"reply to who" that should read...
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