Passing variables

I do a lot of checking in /etc/procmailrc and as part of the checking 
I use the following:
:0
* ^Subject:(.*\<)?\/[^  ].*
{ SUBJECT=$MATCH }

:0
* ^To:(.*\<)?\/[^ ].*
{ TOHEAD=$MATCH }

:0 h
CLEANFROM=|formail -IReply-To: -rtzxTo:

 # username portion
 :0
  * CLEANFROM ?? ^\/[^(_at_)]+
   {
       UNAME=$MATCH
   }
  # domain portion
 :0
 * CLEANFROM ?? @\/.*
 {
         UDOMAIN=$MATCH
 }
LOG="\"$CLEANFROM\", \"$TOHEAD\", \"$SUBJECT\"$NL"

However, when I try to use the "$UNAME" or $SUBJECT in a .procmailrc, 
the variables are unassigned.  Is there 1) something I am doing wrong 
2) some way for those variables to persist to the user's own 
.procmailrc?  I hate to duplicate the code into every .procmailrc.
--
| kremels(_at_)kreme(_dot_)com | www.suthgaylord.com | www.david-dodge.com |

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