Starting April 1, if you send a letter and envelope to an inmate, expect a "return to sender" label on it; that's because jails across the state will only allow post cards.

The new move is aimed to increase jail security by making it faster to sort mail and reduce the amount of contraband smuggled in. All postcards must meet certain requirements. They must be typed or written in blue and black ink only. No picture post cards will be accepted -- all must be color-white only and pre-stamped.

"We no longer will have the necessity to go through envelopes and to worry about contraband and to worry about items that people are trying to send into inmates that are illegal and threat they're no supposed to have access to here at the jail," says Eugene Morris, spokesperson for the Alachua County jail.

There are some exceptions. Privileged mail which is considered anything between an inmate and an attorney, or mail from a government official, or news agency will be allowed in - everything else will be limited to a post card.