The U.S. Postal Service has reversed its decision to close four Maine post offices during lunch hours.

Effective Monday, Nov. 17, the post offices in Harrison, Mechanic Falls, Rumford and Northeast Harbor will return to their pre-August 2003 hours of operation, U.S. Sen. Olympia Snowe announced Wednesday.

The potential reduction of hours and services at community post offices was first highlighted after Snowe learned of the proposed closures in August.

“The opinions of Mainers who utilize the postal services in these communities was strong and unified, and I applaud every Mainer who voiced their concerns over the proposed change,” Snowe said in a prepared statement.

Beginning Monday there will be no lunch closure in Mechanic Falls, Rumford or Northeast Harbor. The Harrison Post Office will close from 1 to 2 p.m. instead of from noon to 2.