241230

이메일 설정하기
master@st.kr
smtp: 25
pop: 110
imap: 143

sudo nano /etc/mail/sendmail.cf
98행 수정: Cwlocalhost -> Cwst.kr
269행 수정: Addr=127.0.0.1 부분삭제
270행 수정: Addr=127.0.0.1 부분삭제

sudo systemctl restart sendmail

sudo nano /etc/mail/access
st.kr RELAY
10.0.2 RELAY
naver.com RELAY
kgr.kr RELAY
192.168.0 RELAY

적용하기
sudo makemap hash /etc/mail/access < /etc/mail/access

sudo systemctl restart sendmail

sudo nano /etc/dovecot/dovecot.conf
30행 수정: listen = *
33행 수정: base_dir = /var/run//dovecot
34행 수정: disable_plaintext_auth = no

sudo nano /etc/dovecot/conf.d/10-mail.conf
121행 수정: mail_access_groups = mail
166행 수정: lock_method = fcntl

systemctl restart sendmail
systemctl restart dovecot

sudo nano /etc/hostname
mail.st.kr

reboot