For your information: the httpdcheck, loadwatch and raidcheck perl-scripts
are using the perl-class Mail::Sendmail -
you can either install it via CPAN using the following commandline:

perl -MCPAN -e "install Mail::Sendmail"

(you probably should be root to do this on your system)
or you can simply use the provided perl-Mail-Sendmail-0.79-1.noarch.rpm
here if you're running an rpm-based distribution like
redhat, fedora, suse and others.

on debian simply do an "apt-get install libmail-sendmail-perl"

best
harald kapper - http://kapper.net/