From:
John Leach's Encyclopedia of Postal Authorities :

E

EAF - Eupen & Malmedy

EAF - Eupen & Malmedy

EAF
East Africa
East Africa & Uganda Protectorates
East Africa Forces
East China
East Germany
East India
East India Company
East Silesia
Eastern Arabia
Eastern Command Area
Eastern Karelia (Finnish Occupation)
Eastern Rumelia
Eastern Siberia
Eastern Thrace
Ecuador
Edirne
EEF
Eesti
Egeo
Egypt
Egypt (British Forces)
Egypt (French Post Offices)
Egyptian Occupation Issues
Egyptian Post Offices in the Turkish Empire
Eire
Ellas
Ellice Islands
Elobey, Annobon & Corisco
El Salvador
Elsass
England
Epirus
Equatorial Guinea
Eritrea
Eritrea (British Administration)
Eritrea (British Military Administration)
Eritrea (British Occupation)
Est Africain Allemand Occupation Belge
Estado da India
Estero
Estonia
Estonia (German Occupation)
Estonia (pre-Soviet)
Ethiopia (Abyssinia)
Ethiopia (French Post Offices)
Ethiopia (Italian Occupation)
Eupen & Malmedy (Belgian Occupation)