# not local -- try mailer table lookup
R$* <@ $+ > $*		$: < $2 > $1 < @ $2 > $3	extract host name
R< $+ . > $*		$: < $1 > $2			strip trailing dot
R< $+ > $*		$: < $(mailertable $1 $) > $2	lookup
R< $~[ : $+ > $* 	$>95 < $1 : $2 > $3		check -- resolved?
R< $+ > $*		$: $>90 <$1> $2			try domain