I use MIME::Lite for this sort of task.

Here is some code from a module I have which sends emails to a list pulled from a database:

  if(defined($email->{'attachments'}->{'count'})){
    $msg = MIME::Lite->new(
          From    => "$email->{'from'}",
          To      => "$row->{$email->{'db'}->{'email_field'}}",
          Subject => "$subject",
             Type => 'multipart/mixed',
        );
    if(defined($email->{'cvr_ltr_html'})){
      # attach html cover letter
      $msg->attach(
                Type => 'text/html',
                Data => $copy_html,
                   );
    } else {
      # attach plain text cover letter
      $msg->attach( Type => 'TEXT',
                  Data => "$copy",
                 );
    }

  } else {
    # print "We now produce a plain text email message.\n";
    $msg = MIME::Lite->new(
          From    => "$email->{'from'}",
          To      => "$row->{$email->{'db'}->{'email_field'}}",
          Subject => "$subject",
             Data => $copy,
        );
  }

  if(defined($email->{'attachments'}->{'count'})){
    for my $i (1 .. $email->{'attachments'}->{'count'}){
      # print STDERR $email->{'attachments'}->{$i}->{'Content-type'},"
+\n";
      # print STDERR $email->{'attachments'}->{$i}->{'file-path'},"\n"
+;
      $msg->attach( Type => $email->{'attachments'}->{$i}->{'Content-t
+ype'},
             Disposition => $email->{'attachments'}->{$i}->{'dispositi
+on'},
                    Path => $email->{'attachments'}->{$i}->{'file-path
+'},
                Filename => $email->{'attachments'}->{$i}->{'filename'
+},
                Encoding => 'base64',
                      );
    }
  }

 my $smtp = Net::SMTP->new($mailhost,
          Hello => $email->{'hello'},
          Debug => 0 ) or return 0;

  my $data = $msg->body_as_string;
  my $header = $msg->header_as_string;

  $smtp->to($row->{$email->{'db'}->{'email_field'}});
  $smtp->data();
  $smtp->datasend("$header");
  $smtp->datasend("\n\n");
  $smtp->datasend("$data \n");
  $smtp->dataend();

  $smtp->quit;
[download]

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