How to reply a uucp mail?

[tik at eceyv.ncsu.edu]

Although I have used UNIX for years, I never know how to send or reply
an email by UUCP until this hits me the other day.  The problem is that
I have this friend who has no way to access Internet. The only way he
can contact me is thru the UUCP.  Can some of you unix wizard tell me
how can I reply a mail which has this form of addr:
		user at node.uucp     or
		company!user at cs.university.edu

Thanx a lot,

ps. Please reply to tik at eceyv.nscu.edu. I seldom read this newsgroup, 
    since I am not an unix wizard.