[CentOS 7] Sendmail 설치, 설정 그리고 실행 Sendmail Install, Configure and Run

Sendmail 하기 전 DNS부터 하세요. Start with DNS before Sendmail. ↓↓↓↓↓ https://bddung1014.blogspot.com/2021/05/centos-7-dns-building-dns-server.html