WASHINGTON — One more challenge for the Postal Service: people who just say no. Unlike the national "do not call" registry, the "do not mail" effort is developing state by state, including in Hawai'i.

Below are states that recently introduced legislation to block some of the estimated 19 billion catalogs and other unwanted mail sent each year. In some cases, the efforts have fizzled after lobbying by state business groups and direct mail advocates, and legislation has been withdrawn or postponed. Many of the bills introduced last year carried over to the 2008 sessions.

States that have introduced "do not mail" legislation since 2007:

Arkansas (bill withdrawn)

Colorado

Connecticut

Hawai'i

Illinois

Maryland (bill withdrawn)

Michigan

Missouri

Montana

New Hampshire

New Jersey

New York

North Carolina

Rhode Island

Tennessee (bill withdrawn)

Texas

Vermont

Washington

Sources: U.S. Postal Service, Direct Marketing Association