My "From:" address is wrong?

Bill McCarthy (actuary@nando.net)
Wed, 17 Apr 96 00:53:52 -0400

I use yarn for newsgroups. My newsgroup host is castle.nando.net, so I changed the config line
to read: host=castle.nando.net. There is no line, that I could find, to specify the Email host,
which is mailhost.nando.net. My Email address is simply nando.net (so I set:
Reply-To=actuary@nando.net).

The problem is, when someone replies by Email, it is sent to actuary@castle.nando.net, my
newsgroup host.

How do I configure to avoid this?

Thanks,

-----------------
Bill McCarthy
actuary@nando.net
Wendell, NC USA