---
- hosts: centos8_init
  user: ioniere
  become: yes

  vars:
    myhostname: mail.25ni.site
    mydomain: 25ni.site

  tasks:

  - name: postfix 및 saslauthd 설치
    yum:
      name: ['postfix', 'cyrus-sasl', 'cyrus-sasl-plain']
      state: latest

  - name: main.cf 복사
    get_url:
      url: http://data.yeonghoon.kim/centos8_postfix/source/main.cf
      dest: /etc/postfix/main.cf
      force: yes

  - name: master.cf 복사
    get_url:
      url: http://data.yeonghoon.kim/centos8_postfix/source/master.cf
      dest: /etc/postfix/master.cf
      force: yes


  - name: main.cf 설정 - 도메인 추가
    blockinfile:
      path: /etc/postfix/main.cf
      insertafter: EOF
      block: |
        myhostname = {{ myhostname }}
        mydomain = {{ mydomain }}

  - name: saslauthd 구동
    service:
      name: saslauthd
      state: started
      enabled: yes

  - name: postfix 구동
    service:
      name: postfix
      state: started
      enabled: yes

 -메일 테스트(계정 인증) - 성공

[root@25ni ~]# telnet 222.239.xxx.xxx 587
Trying 222.239.xxx.xxx...
Connected to 222.239.xxx.xxx.
Escape character is '^]'.
220 mail.25ni.site ESMTP Postfix
auth login
334 VXNlcm5hbWU6
id(base64형식)
334 UGFzc3dvcmQ6
password(base64형식)
235 2.7.0 Authentication successful
mail from:ioniere@25ni.site
250 2.1.0 Ok
rcpt to:me@yeonghoon.kim
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
abcdefg_test
.
250 2.0.0 Ok: queued as 5B15820F78E3
quit
221 2.0.0 Bye
Connection closed by foreign host.
 

 -메일 테스트(계정 인증 X) - 실패

[root@25ni ~]# telnet 222.239.xxx.xxx 587
Trying 222.239.xxx.xxx...
Connected to 222.239.xxx.xxx.
Escape character is '^]'.
220 mail.25ni.site ESMTP Postfix
mail from:ioniere@25ni.site
250 2.1.0 Ok
rcpt to:me@yeonghoon.kim
554 5.7.1 <mail.25ni.pe.kr[115.68.xxx.xxx]>: Client host rejected: Access denied
quit
221 2.0.0 Bye
Connection closed by foreign host.

 host, user, myhostname, mydomain은 상황에 맞게 수정 후 사용


방화벽 설정은 별도로 진행(25, 587)