package Mail::Mailer::qmail;
use vars qw(@ISA);
require Mail::Mailer::rfc822;
@ISA = qw(Mail::Mailer::rfc822);

sub exec {
    my($self, $exe, $args, $to, $sender) = @_;
    my $address = defined $sender && $sender =~ m/\<(.*?)\>/ ? $1 : $sender;

    exec($exe, (defined $address ? "-f$address" : ()));
    die "ERROR: cannot run $exe: $!";
}