my $sender = new Mail::Sender( {from => $work, smtp => 'mail.domain.com'}) 
      || die "$Mail::Sender::Error\n";

  (ref $sender->MailFile({to => $email, subject => $subj_line, 
                          file => \@files, encoding => 'base64',
                          msg => 'Here are the price change worksheets.'})
   ) || die "Error on $email: $Mail::Sender::Error\n";