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[Unit] Description=ProtonMail IMAP/SMTP bridge Documentation=https://protonmail.com/bridge/ [Service] ExecStart=/usr/bin/protonmail-bridge --no-window Restart=on-failure # Hardening ProtectSystem=full PrivateTmp=true SystemCallArchitectures=native MemoryDenyWriteExecute=true NoNewPrivileges=true [Install] WantedBy=default.target