It seems that many English language learners have deficiency to write persuasively. This portent has been observed among university students, particularly those from technical fields. Therefore, the present study examines the use of ethos, pathos and logos in persuasive email writing and determines if these features were used appropriately. The participants involved in this research were 43 third-year Malaysian engineering students. The task evaluated was persuasive email writing, and the data was obtained from an official university website forum. The data was analysed qualitatively by using Aristotelian rhetorical theory. The results show that there were some persuasive techniques used by the students in their email writing. It appears that the appeal to pathos was preferred highly in directly connecting with the emotions of the instructors. This was followed by appeals to ethos, where the students used their own ethicality and credibility to persuade the instructor into giving them an extension deadline of their classwork. The findings further revealed that appeal to logos were not used in a very persuasive manner, which could also due to avoiding logical fallacies. Therefore, the present study shows the engineering students prefer to link with emotions in their email writing in achieving their goals.