use warnings;
use strict;

use Config::IniHash;

# parse the config file into a hashref
my $config   = ReadINI 'pm1562.ini';

# default values
my $defaults = { header => { to => 'foo', from => 'bar' } };

# iterate the defaults and put them into $config if they not 
# already exist
for my $section ( keys %{$defaults} )
{
	for my $option ( keys %{$defaults->{$section}} )
	{
		$config->{$section}->{$option} = $defaults->{$section}->{$option}
			unless exists $config->{$section}->{$option};
	}
}

#use the values, no need for a variable $to or $from
print $config->{header}->{to}, "\n", 
      $config->{header}->{from}, "\n",

##</code><code>##

[header]
to=holli

##</code><code>##

holli
bar