Server error: 553 malformed address:  <@somewhere.com> 
##</code><code>##

ref ($sender = new Mail::Sender()) 
  or die "From $sname:  $Mail::Sender::Error\n";
(ref ($sender->MailFile(
  {to => $addr,
   subject => 'HP Notify Attachment',
   msg => "The attachment sent courtesy of $sname.",
   file => $fname
   }))
   )
   or die "From $sname:  $Mail::Sender::Error\n";