allow the efficiencies of a low-cost mailstream to be available to all who can use them.
( ( ( allow ( ( the efficiencies ) ( of ( a ( low-cost mailstream ) ) ) ) ) ( to ( be ( available ( to ( all ( who ( can ( use them ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB allow) (NP (NP (DT the) (NNS efficiencies)) (PP (IN of) (NP (DT a) (JJ low-cost) (NN mailstream)))) (S (VP (TO to) (VP (VB be) (ADJP (JJ available) (PP (TO to) (NP (NP (DT all)) (SBAR (WHNP (WP who)) (S (VP (MD can) (VP (VB use) (NP (PRP them))))))))))))) (. .)))
Efficient, low-cost mailstreams should be available to potential users. 
( ( Efficient ( , ( low-cost mailstreams ) ) ) ( ( should ( be ( available ( to ( potential users ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Efficient) (, ,) (JJ low-cost) (NNS mailstreams)) (VP (MD should) (VP (VB be) (ADJP (JJ available) (PP (TO to) (NP (JJ potential) (NNS users)))))) (. .)))