E-mail do not deliver to receipients with foreign characters in name [UTF-8 related]

E-mail do not deliver through sendmail to receipients with foreign characters in name. This may not concern all machines.

A less proper solution to fix this is by chaning "Name <email>" to "email".

I.e. find

  if (EMAIL_TRANSPORT == 'smtp') {
    return mail($to_addr, $subject, $this->output, 'From: ' . $from . $this->lf . 'To: ' . $to . $this->lf . implode($this->lf, $this->headers) . $this->lf . implode($this->lf, $xtra_headers));
  } else {
    return mail($to, $subject, $this->output, 'From: '.$from.$this->lf.implode($this->lf, $this->headers).$this->lf.implode($this->lf, $xtra_headers));
  }

Change to

  if (EMAIL_TRANSPORT == 'smtp') {
    return mail($to_addr, $subject, $this->output, 'From: ' . $from . $this->lf . 'To: ' . $to . $this->lf . implode($this->lf, $this->headers) . $this->lf . implode($this->lf, $xtra_headers));
  } else {
    return mail($to_addr, $subject, $this->output, 'From: '.$from.$this->lf.implode($this->lf, $this->headers).$this->lf.implode($this->lf, $xtra_headers));
  }