라운드큐브 메일 사용을 위한 스텝1smtp인증서버 구축진행 설치환경[daraksharavim.tistory.com]$ cat /etc/redhat-releaseRocky Linux release 8.6 (Green Obsidian)설치확인[daraksharavim.tistory.com]$ rpm -qa | grep postfix없다면 설치진행[daraksharavim.tistory.com]$ yum -y install postfix상태확인[daraksharavim.tistory.com]$ systemctl status postfix● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/usr/lib/systemd/system/postfix..