sendmail 설치

1. postfix 삭제

- # yum remove postfix

2. sendmail 설치

- # yum install sendmail sendmail-cf cyrus-sasl*

3. 설정파일 변경

- # vi /etc/mail/sendmail.mc

  SMTP인증사용 설정

  (Before) dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

  (After) TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

  (Before) dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

  (After) define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

  모든IP주소에서 사용하도록 설정

  (Before) DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

  (After) DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

4. 사용자 생성

- # adduser -M -s /bin/false tomcat

  # passwd tomcat

5. virtusesrtable 추가

- # vi /etc/mail/virtusesrtable

  ljo@test.com     tomcat (탭키로 띄움)

6. DB 작업

- # makemap hash /etc/mail/virtusertable < /etc/mail/virtusertable

7. 방화벽 설정

- # firewall-cmd --permanent --zone=public --add-port=25/tcp

  # firewall-cmd --reload

8. 서비스 자동시작 및 실행

- # chkconfig --level 2345 saslauthd on

  # chkconfig --level 2345 sendmail on

  # systemctl start saslauthd

  # systemctl start sendmail