[CentOS] Setup Mail server (메일 서버 구축)

MTA (Mail Transfer Agent)
ex) Sendmail, Qmail, Microsfot Exchange

MUA (Mail user Agent)
ex) Outlook Express

MDA (Mail Delivery Agent)
ex) POP3, IMAP




Send Protocol
SMTP (Simple Mail Transfer Protocol)
 : TCP/IP mail transfer protocol. Default port 25.

1. Install Sendmail packages

# yum -y install sendmail*

2. Configure SMTP

# vi /etc/mail/sendmail.mc

Remove 'dnl' command

# m4 /etc/mail/sendmail.mc > /ect/mail/sendmail.cf
# vi /etc/mail/snedmail.cf

Cwlocalhost ->Cw[MAIL_SERVER_DOMAIL]

127.0.0.1 (Internal Mail Server) -> 0.0.0.0

3. Configure Mail Access

# vi /ect/mail/access

# makemap hash /etc/mail/access < /etc/mail/access

# vi /etc/mail/local-host-names

4. SASL security module

# service saslauthd start
# chkconfig saslauthd on
# init 6

5. Disable Firewall

# service iptables stop
# chkconfig --level 345 iptables off
# vi /etc/selinux/config
# getenforce

# service iptables status

6. Install Dovecot packages

# yum -y install dovecot

7. Configure Dovecot

# vi /etc/dovecot/dovecot.conf

# vi /etc/dovecot/conf.d/10-mail.conf

# vi /etc/dovecot/conf.d/10-ssl.conf

# vi /etc/dovecot/conf.d/10-auth.conf

8. Start Dovecot

# service dovecot start
# chkconfig dovecot on