With in-game mail, your clone can contact any clone created in Golden Clone. To do this, select the tab "Mail", which is located in the header of the game interface.
To send a personal message to a clone in the "Mail" tab, you need to click "Create" and write the nickname of the clone you want to send a message to in the appropriate column.
You can send the message you want to convey to residents of houses, settlements and principalities, as well as to employees of businesses.
By clicking on the "Ban" button next to the clone's nick in the message you can add the clone to the black list and stop receiving messages from him, while you can write to this clone.