Abstract: From a web of paper a mailing item (10) comprising envelope and contents is printed personalized on a first conveying section (2) in individual stations. After being turned over the web of paper is supplemented, where necessary, by further paper parts, it then being cut to contour laterally and provided with side flaps folded inwards for the envelope. After this, the cut-to-size item is parted as a unit from the web of paper by a cross-cutter (43) and the contents folded on themselves transversely as well as on the cut-to-size item for the envelope. This unit is then diverted at right angles to a second conveying section (3) in which the cover sheets of the envelope are folded open with interposition of the contents, the cover sheets thereby being secured to each other by the side flaps. After this, the envelope opening is closed by the closing flap.