Hello There!

Your probably need to put the following in your ~/.emacs file

(setq user-full-name "Your Name")
(setq user-mail-address "your@email.add")
(setq mail-default-reply-to "your@anotherorsame.email.add")

For example I have

(setq user-full-name "G Anna")
(setq user-mail-address "drguruolai@eth.net")
(setq mail-default-reply-to "anna7sept@linuxmail.org")

in my ~/.emacs.el file.

HTH

anna