This study aims at casting the light on the English Language Teachers' Perceptions about Netiquette of Email Using and to what extent there is a congruence between their perceptions and their real abilities in using emails. It is of two new data collection tools developed and built by the researcher himself. The study is could be of great importance in the TEFL and TESOL fields as follows: a) English Language teachers: It helps them knowing their general perceptions about netiquette of using Emails and to what extent there is congruence between these perceptions and their real abilities in using emails efficiently which help them to improve their abilities. b) ICDL teacher educators: it is useful for them in reexamining their teaching methodology regarding the process of teaching the ICDL course. c) ICDL course designers: It is useful for them in preparing teaching materials and designing the syllabus. d) Teaching methodology researchers: it is useful for them in conducting more studies about IT Courses.