During the Mandate, postal services were provided by British authorities.
After occupation by allied forces in 1917, basic postage was free for civilians.
Registration fees and parcels had to be franked using British or Indian stamps.
Once the EEF stamps printed in Cairo came on sale, mail to overseas destinations had to be paid for from 10 February 1918, and from 16 February 1918 also mail to the then occupied territories and Egypt.
The structure of postal rates followed broadly British practice and new services, like airmail and express delivery, were added over the years.