How to set a "Reply-To: " filed in the mail header?

[Jan Stevens]

Most mailers use a fixed, predefined header. To change the header you
must use a mailer which is capable of adding lines to the header. Elm is
such a type of mailer. What the layout of the header concerns :
  It ends with an empty line.
  It must have a To and From line.

Jan Stevens, Unix Support Engineer
Philips CFT, the Netherlands
e-mail: jan at philtis.cft.philips.nl