Request emails are vital in workplace communication. This study uses a three-round Delphi method to investigate the types, frequencies, and perceived burdens of request emails in Korean organizations. Fifty workers from large corporations identified and evaluated 32 common email scenarios, revealing that the most frequent requests are sent to superiors asking for approval, feedback, and document reviews whereas the most burdensome requests are sent to colleagues asking them to perform tasks. Highlighting the hierarchical dynamics of Korean workplaces and the importance of culturally appropriate communication strategies, the findings from this study can inform global training programs and curricula on workplace communication.