Sub with My variable

rodry has asked for the wisdom of the Perl Monks concerning the following question:

Here is the code in question

my $tabla = param("tabla");

if ($tabla eq "Miembros")
{
   my $llave = MensajeMiembros();
}

sub MensajeMiembros
{
my $email = param("email");
my $mensaje = "Blah Blah";

return ($email);
[download]

When I remove the my from $email it works as expected.

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