how do I tell pine to use a custom reply-to address?

[David Blackman <blackmad@stuy.edu>]

I don't want it to use [username]@[user-domain]

my username is not my email address and my user-domain si not my
mailserver.

help?

--dave

(luckily it is the same as my suername @ school, so I can set it to that
temporarily)