$ sudo apt install postfix
			

configure

				$ sudo dpkg-reconfigure postfix-config
			

				# yum install -y postfix
			

				myhostname = mail.example.com
				mydomain = example.com
				myorigin = $mydomain
				inet_interfaces = all
				mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
				#mynetworks = 192.168.0.0/24, 127.0.0.0/8
				#relay_domains =
				home_mailbox = Maildir/
			

				Postfix Install

				# Centos Init
				curl -s https://raw.githubusercontent.com/oscm/shell/master/os/centos7.sh | bash
				curl -s https://raw.githubusercontent.com/oscm/shell/master/os/selinux.sh | bash
				curl -s https://raw.githubusercontent.com/oscm/shell/master/os/iptables/iptables.sh | bash
				curl -s https://raw.githubusercontent.com/oscm/shell/master/os/ntpd/ntp.sh | bash
				curl -s https://raw.githubusercontent.com/oscm/shell/master/os/ssh/sshd_config.sh | bash

				# Install Postfix
				curl -s
				https://raw.githubusercontent.com/oscm/shell/master/mail/postfix/postfix.sh | bash