I think I would just open a pipe to sendmail en put in the stuff. For attachments you can mime encode your self and send a self constructed multipart message. This isn't to hard.

Something like this:

#!/usr/bin/perl

use MIME::Base64;

my $fullname = "Webmaster 2organize.com";
my $username = "webmaster";
my $hostname = "2organize.com";
my $my_config_file = "config";  

my $from = "$fullname <$username\@$hostname>";
my $bound = "e7e0ec52ed9c9026a8e3f293d87abe92";

open (MAIL,"|sendmail -C $my_config_file") || Error("Couldn't open pip
+e to mal injector\n");
print MAIL "Content-Type: multipart/mixed; boundary=\"$bound\"\n";
print MAIL "From: $from\n";
print MAIL "To: $to\n";
print MAIL "Bcc: $bcc\n";
print MAIL "Subject: Online vacature voor $app\n\n";


print MAIL "$mail_body\n";

foreach my $file (@ARGV)
  open(FILE,"<$file) || die("Couldn't open $file!\n");
  seek (FILE, 0, 0);
  my $content = "";
  while (<FILE>) {
    $content .= $_;
  }
      
  print MAIL "\n--$bound\n";
  print MAIL "Content-type: $type{ExtGetter($file)}\n";
  print MAIL "Content-Disposition: attachment; filename=\"$filename\"\
+n";
  print MAIL "Content-Transfer-Encoding: base64\n\n";
  print MAIL encode_base64($content);
  print MAIL "\n";
}
[download]

Of course this untested and serves merely as an example

Sinister greetings.
perldoc -q $_