JACKSON -- Some Jackson residents are angry.

"We are concerned," said Therese Cowan, a postal worker in the city.

Concerned, and angry, about potentially losing her mail.

"They're about to make major changes to the way mail is processed here in Jackson."

More precisely, mail might not be processed in Jackson at all. The U.S. Postal Service is mulling a plan to consolidate -- or flat out close -- both centers in the town. The problem? Those offices serve people living in any zip code that begins with 492, spanning from Leslie all the way south to the Ohio border.

And the workers?

"We're looking at 30 to 50 jobs at this point," said Tony Donoho, vice president of the Jackson postal workers union. "But the trickle-down effect from that is quite a bit higher, when you consider that those wages now leave Jackson."

Under the proposed plan, post office duties in Jackson would be shifted to the Lansing post office, a move protesters say could leave Jackson-area residents in mail limbo.

"Even the local union in Lansing is concerned that they won't be able to do their jobs as efficiently as we do."

Which could mean delays for Jackson residents.

But representatives from the postal service say their hands are tied. Mail volume in the U.S. is down more than 30 billion pieces in the past two years. Cuts have to be made.

Therese Cowan says that's no excuse for leaving folks without their mail.

"This could mean delays in checks, prescriptions, even your birthday gift might not get there on time."