Subject: From Addresses

From: [email-masked] (Len Coleman)
Date: 14 Apr 1996 15:26:06 -0700

Any mail that is addressed to my domain address retains the TO address
until I get it, but when I attempt to reply with that same address, it
is automatically changed to my regular address.

In other words, my regular ID is [email-masked], but mail reaches me at
[email-masked] or [email-masked], but my responses always go out
as [email-masked].

How can I respond to a message sent TO [email-masked] so that it goes
out FROM [email-masked]?