Problemas con la recepción de mail enviados con FormMail

Hola a todos

Estoy mirando de montar un formulario usando FormMail (en perl), he ido siguiendo los pasos que he encontrado aquí:

http://www.forosdelweb.com/f12/taller-perl-cgi-281414/

Lo he hecho todo tal cuál, cuando uso el formulario me aparece el mensaje diciéndome que me ha sido enviado el contenido del correo y entonces... entonces no pasa nada, no me llega nada y no entiendo que es lo que pasa.

La dirección en la que tengo el formulario de prueba es:

http://www.tag-cs.es/pruebaformulariocgi3.html

y el codigo del FormMail es:

#!/usr/bin/perl
##############################################################################
# FormMail Version 1.93 #
# Copyright 1995-2009 Matt Wright [correo eliminado] #
# Created 1995-06-09 Last Modified 2009-07-14 #
# Matt's Script Archive, Inc.: http://www.scriptarchive.com/ #
##############################################################################
# COPYRIGHT NOTICE #
# Copyright 1995-2009 Matthew M. Wright All Rights Reserved. #
# #
# FormMail may be used and modified free of charge by anyone so long as this #
# copyright notice and the comments above remain intact. By using this #
# code you agree to indemnify Matthew M. Wright from any liability that #
# might arise from its use. #
# #
# Selling the code for this program without prior written consent is #
# expressly forbidden. In other words, please ask first before you try and #
# make money off of my program. #
# #
# Obtain permission before redistributing this software over the Internet or #
# in any other medium. In all cases copyright and header must remain intact. #
##############################################################################
# ACCESS CONTROL FIX: Peter D. Thompson Yezek #
# XSS + REDIRECT FIX: Francesco Ongaro, Giovanni Pellerano & Antonio Parata #
# v1.93 http://www.ush.it/team/ush/hack-formmail_192/adv.txt #
##############################################################################
# Define Variables #
# Detailed Information Found In README File. #

# $mailprog defines the location of your sendmail program on your unix #
# system. The flags -i and -t should be passed to sendmail in order to #
# have it ignore single dots on a line and to read message for recipients #

$mailprog = '/usr/lib/sendmail -i -t';

# @referers allows forms to be located only on servers which are defined #
# in this field. This is a security fix to prevent others from using your #
# FormMail script on their web site. #

@referers = ('tag-cs.es');

# @recipients defines the e-mail addresses or domain names that e-mail can #
# be sent to. This must be filled in correctly to prevent SPAM and allow #
# valid addresses to receive e-mail. Read the documentation to find out how #
# this variable works!!! It is EXTREMELY IMPORTANT. #
@recipients = &fill_recipients(@referers);

# ACCESS CONTROL FIX: Peter D. Thompson Yezek #
# @valid_ENV allows the sysadmin to define what environment variables can #
# be reported via the env_report directive. This was implemented to fix #
# the problem reported at http://www.securityfocus.com/bid/1187 #

@valid_ENV = ('REMOTE_HOST','REMOTE_ADDR','REMOTE_USER','HTTP_USER_AGENT');

# Done #
##############################################################################

Debe haber algún error por alguna parte, pero a saber donde. Si alguien puede ayudarme me haría un gran favor.

Editado: Acabo de ver que hay un apartado específico para formularios. Pido disculpas por el despiste.

Por si alguien le puede servir:

El problema se encontraba en la ruta del sendmail, en vez de ser

$mailprog = '/usr/lib/sendmail -i -t';

tenía que ser

$mailprog = '/usr/sbin/sendmail -i -t';