%hash = ( # george is added
      'george@host.com' => 'george',
);

%hash = ( # bill is added
      'george@host.com' => 'george',
      'bill@company.net' => 'bill',
);

##</code><code>##

%hash = ( # george is added
      'email' => 'george',
);

%hash = ( # bill is added
      'email' => 'bill',
);

##</code><code>##

$this{$email} = $name;