SEMAR is an internal special electronic mail application at the Faculty of Recording Media Arts, Yogyakarta Institute of the Arts. This application is intended for the entire academic community of the Faculty of Recording Media Arts, Yogyakarta Institute of the Arts, both lecturers, employees, and students. This e-mail application supports disposition facilities, digital signatures and a QR Code security system to ensure the authenticity of letters. With the application the mail control process can run more quickly, effectively and efficiently.