how do I display senders' e-mail addresses in to line in outlook?

[Diane Poremsky [MVP]]

in new messages you are writing or in messages you received?

assuming you mean senders addresses on mail you receive - see
http://www.slipstick.com/exs/customfields.htm

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Diane Poremsky [MVP - Outlook]

Outlook & Exchange Solutions Center: http://www.slipstick.com/

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