A Mail maxi letter is a service offered by Swiss Post for private customers. Mail must be handed in at post office counters by the time they close in the morning, but by 12 o’clock at the latest. In more than 200 post officesTarget not accessible, posting is possible up to 4 p.m. Final acceptance times are decisive for the service offer. Delivery takes place on the next working day (Monday to Friday); A Mail maxi letters posted on Saturday are delivered the following Tuesday. They cannot be posted as Registered mail items.