#!/usr/bin/perl -l

use strict;
use warnings;
use Data::Dumper;

if (@ARGV) {
    print Dumper \@ARGV;
} else {
    my $email = 'myemail@gmail.com';
    system "$0 -email $email";
    print '-' x 20;
    system $0, -email => $email;
}

__END__

##</code><code>##

$VAR1 = [
          '-email',
          'myemail@gmail.com'
        ];

--------------------
$VAR1 = [
          '-email',
          'myemail@gmail.com'
        ];