Embarrassing Email Question

This is embarrassing, but that's never stopped me before.
I've been using the same chunk of code to send simple acknowledgement emails from a script for a long time (it works).
I know it's not MIME:, but I don't know if its SENDMAIL, or what.
I wanted to add an attachment to this, but it's looking as if this isn't the format inwhich to do it.
So the question is - what kind of MAIL is used below, and will it allow attachments
#####################################################
 if (open(MAIL,"|mail tmccar10\@ford.com")){                
          print "Emailed to Decision Support!\n<BR>";
          print MAIL "\n";
          print MAIL "Name: $Q::name (PROFS ID: $Q::profsid) has submitted the following request for a NEW report on $date\n";
          print MAIL "Department: $Q::deptno\n";
...
}
else {
      print "Open to mail failed!\n<BR>";      
}
            close(MAIL);