greylisting setup
 [rsc] --rw-rw-r-- M 438118 glenda sys 247 Apr  6 12:05 cron/upas/cron
	/n/sourcesdump/2006/0406/plan9/cron/upas/cron:1,2 - 
	/n/sourcesdump/2006/0407/plan9/cron/upas/cron:1,5
	  # kick mail retries (replace mailserver with your system)
	  0,10,20,30,40,50 * * * *	mailserver		/bin/upas/runq -a /mail/queue /mail/lib/remotemail
	+ 
	+ # clean up after grey list
	+ 47 4 * * *	mailserver	cd /mail/grey && rm -f [0-9]*.[0-9]*.[0-9]*.[0-9]*
 [rsc] --rw-rw-r-- M 438118 rsc sys 2765 Apr  6 12:03 dist/replica/plan9.proto
	/n/sourcesdump/2006/0406/plan9/dist/replica/plan9.proto:14,19 - 
	/n/sourcesdump/2006/0407/plan9/dist/replica/plan9.proto:14,20
	  	faxoutqueue	d777 upas upas
	  	faxqueue	d777 upas upas
	  		*	- upas upas
	+ 	grey	d777 upas upas
	  	fs	- upas upas
	  	lib	- upas upas
	  		+	- upas upas