Don't plumb the pipeto messages.
 [rsc] --rw-rw-r-- M 191333 rsc sys 3342 Sep 22 09:09 mail/lib/pipeto.lib
	/n/sourcesdump/2005/0922/plan9/mail/lib/pipeto.lib:75,81 - 
	/n/sourcesdump/2005/0923/plan9/mail/lib/pipeto.lib:75,81
	  	} >$TMP.msg2 || exit $status
	  	mv $TMP.msg2 $TMP.msg || exit $status
	  	unmount /mail/fs
	- 	upas/fs -f $TMP.msg || exit $status
	+ 	upas/fs -pf $TMP.msg || exit $status
	  }
	  
	  # classify message according to token-based white list 
	/n/sourcesdump/2005/0922/plan9/mail/lib/pipeto.lib:150,154 - 
	/n/sourcesdump/2005/0923/plan9/mail/lib/pipeto.lib:150,154
	  
	  # save and parse the mail file
	  sed '/^$/,$ s/^From / From /' >$TMP.msg
	- upas/fs -f $TMP.msg || exit $status
	+ upas/fs -pf $TMP.msg || exit $status