Sending PDF Attachments with Sendmail

I was only able to find explanations of how to do this with mutt (which isn't working for me, god knows why).  In any case, sendmail seems to work and I wrote a script to help.

 #!/bin/sh  
 export MAILTO="$1"  
 export SUBJECT="$2"  
 export BODY=""  
 export ATTACH="$3"  
 (  
  echo "To: $MAILTO"  
  echo "From: from@domain.com"  
  echo "Subject: $SUBJECT"  
  echo "MIME-Version: 1.0"  
  echo 'Content-Type: multipart/mixed; boundary="-q1w2e3r4t5"'  
  echo  
  echo '---q1w2e3r4t5'  
  echo "Content-Type: text/html"  
  echo "Content-Disposition: inline"  
  echo ""  
  #cat $BODY  
  echo "Email Body Here"  
  echo ""  
  echo '---q1w2e3r4t5'  
  echo 'Content-Disposition: inline; filename="'$(basename $ATTACH)'"'  
  echo 'Content-Type: application/pdf; name="'$(basename $ATTACH)'"'  
  echo "Content-Transfer-Encoding: base64"  
  echo ""  
  uuencode --base64 $ATTACH $(basename $ATTACH)  
  echo '---q1w2e3r4t5--'  
 ) | /usr/sbin/sendmail -f from@domain.com $MAILTO  

(you'll need to change the address from@domain.com)

called as follows:

./sendemail.sh to_user@domain.com "Subject" /tmp/file.pdf