use strict;
use Mail::Mailer;

my $mailer = Mail::Mailer->new();
$mailer->open({ From    => $from_address,
                To      => $to_address,
                Subject => $subject,
              })
    or die "Can't open: $!\n";
print $mailer $body;
$mailer->close();

##</code><code>##

open(SENDMAIL, "|/usr/lib/sendmail -oi -t -odq")
                    or die "Can't fork for sendmail: $!\n";
print SENDMAIL <<"EOF";
From: User Originating Mail <me\@host>
To: Final Destination <you\@otherhost>
Subject: A relevant subject line

Body of the message goes here, in as many lines as you like.
EOF
close(SENDMAIL)     or warn "sendmail didn't close nicely";