Turkish postanes (post offices) are indicated by black-on-yellow 'PTT' signs. Most post offices open Monday to Friday from around 8.30am to noon and 1.30pm to 5pm, but a few offices in major cities have extended opening hours.
Letters take between one and several weeks to get to/from Turkey.
When posting letters, the yurtdışı slot is for mail to foreign countries, yurtiçi for mail to other Turkish cities, and şehiriçi for local mail. Visit www.ptt.gov.tr for more information.
If you are shipping something from Turkey, don't close your parcel before it has been inspected by a customs official. Take packing and wrapping materials with you to the post office.
Parcels take months to arrive.
International couriers including DHL also operate in Turkey.