Most newspapers limit your letter to 250 words. It is not worth writing longer letters unless you contact the editors of a particular publication for a "point of view" editorial. Be prepared for lots of obstacles in getting a this type of editorial published.
Don't send your letters to multiple newspapers in the same e-mail. Be sure to include you phone number for verification (won't be printed). Here are the links to send your letters to the editor; go for it...
Hudson Valley News (Southern Dutchess to Rhinebeck)
editorial@thehudsonvalleynews.com
Hudson Valley Press (used to be the Black Press)
editor@hvpress.net
Kingston Freeman
letters@freemanonline.com
Kingston Times
kingstontimes@ulsterpublishing.com
Mid Hudson News
media@statewidenews.com
Northern Dutchess News
northerndutchess@sdutchessnews.com
Observer (Red Hook/Rhinebeck)
letters@rhobserver.com
Post Pioneer (New Paltz)
postpioneer@ulsterpublishing.com
Poughkeepsie Journal
letters@poughkee.gannett.com
Register Star (Red Hook/Hudson)
editorial@registerstar.com
Saugerties Times
saugertiestimes@ulsterpublishing.com
Southern Dutchess News
newsplace@aol.com
Times Herald Record (Middletown)
Click on: http://services.hudsonvalley.com/reader-services/submissions/letter-to-editor/.
Write or paste your letter (250 words or less).
Ulster County Press
letters@ulstercountypress.com
Woodstock Times
woodstocktimes@ulsterpublishing.com