1. A method for sorting postal mailpieces in a sorting machine with sorting outlets comprising the steps of: sorting said mailpieces into said sorting outlets for providing a batch of sorted mailpieces intended for a recipient; imaging said sorting mailpieces of said batch and associating each digital image with a unique mailpiece identifier generated by the sorting machine; transmitting said digital images and unique mailpiece identifiers of said batch of mailpieces in a certain organized order from the sorting machine to the recipient; receiving said unique mailpiece identifiers of said batch of mailpieces in a reorganized order from the recipient to the sorting machine; feeding said sorting machine with said batch of sorted mailpieces; sorting said batch of mailpieces according to the corresponding reorganized order of unique mailpiece identifiers into said sorting outlets.