problemas instalando el sendmail

[Koro@imh.es]

Buenas, tengo Debian Sarge instalado.
Quiero instalar el hylafax y como requisito tengo que tiene que estar instalado
el sendmail

hago un apt-get install sendmail y obtengo
lo siguiente:

Some packages could not be installed.
This may mean that you have
requested an impossible situation or
if you are using the unstable
distribution that some required packages
have not yet been created
or been moved out of Incoming.

Since you only requested a single operation
it is extremely likely that
the package is simply not installable
and a bug report against
that package should be filed.
The following information may help to
resolve the situation:

Sorry, but the following packages have
unmet dependencies:
  sendmail:      
  Depends: sendmail-bin but it is not going to be installed
         
      Depends: rmail but it is not going to be installed
E: broken packages.

Sabeis qué es lo que está pasando??
Qué puedo hacer para instalar el sendmail??

Muchas gracias y un saludo!
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