In the eastern part of the Aden Protectorate sat a region called the Quaiti State in Hadhramaut, also known as the Quaiti Sultanate of Shihr and Mukalla. Near the Kathiri Sultanate, Quaiti (or Qu’aiti) issued its own stamps between 1942 and 1963 (similar to Kathiri). At the time, Aden was a British Protectorate.
Stamps from Quaiti are sought after by people who collect Middle East and Yemen stamps, as well as those who like colonial and British-related philatelic items. Quaiti became part of North Yemen in 1967 and its stamp system was ended.