Yannuri, Ahmad, M. Iwan Wahyuddin, and Andrianingsih Andrianingsih. “Design and Build Mail Server Systems Using Zimbra 8.8.15 and Antispam on Proxmox Mail Gateway 5.2: Design and Build Mail Server Systems Using Zimbra 8.8.15 and Antispam on Proxmox Mail Gateway 5.2”. Jurnal Mantik 4, no. 1 (May 31, 2020): 787-797. Accessed June 18, 2026. https://iocscience.org/ejournal/index.php/mantik/article/view/852.