Hi all
I have problem with Mail::Sender and don't know how to solve it. I'm trying to use MailFile() to send email with attached file(s). All works ok for local addresses, but I get error message Local user "roman.vasicek@email.cz" unknown on host "smtp_server_name" when I use address for delivery from other domain.

I'm using following code

use Mail::Sender;
$smtp = 'smtp_server_name';
$filename = 'document.pdf';
$sender  = new Mail::Sender { smtp    => $smtp };
$success = $sender->MailFile({
  from    => 'rv@petamem.com',
  to      => 'roman.vasicek@email.cz',
  subject => "subject text",
  msg     => ' body ',
  file    => "$filename"
});
if (ref $success) {
  print "OK.\n";
} else {
  print "Error: $Mail::Sender::Error\n";
}
[download]

Mail is send if 'to' contain address from local domain, but if I want send email to other domain error occurs. What is wrong?