There are many Post Office's all over the island, use your scroll-wheel to acces the options shown below while looking at the counter.
|Post Office Options|
|Delivery Job||If you select this, you will have to deliver a package to a random Delivery Point on the island. You will get some cash for it. See also: Delivery_Driver.|
|Message System||If you select this you can send and receive post messages.|
|Lotto||Play the Lottery and win prizes.|
After selecting "Message System", this window will open. Here you can see all the messages you have received. You can read and or delete them. If you click on the drop-down menu, select the name of the player you want to send a message.