Postfixの導入

#yum install postfix

#vi /etc/postfix/main.cf

# 外部に存在しない内部DNSのための対策
myhostname = gabo.pr.j-inb.net
mydomain = gabo.j-inb.net
myorigin = $mydomain
mydestination = $myhostname, localhost.$mydomain, $mydomain, localhost

# OP25B対策
relayhost = [xxx.ne.jp]
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/authinfo
smtp_sasl_security_options = noanonymous
smtp_sasl_mechanism_filter = plain, login

#vi /etc/postfix/authinfo

[xxx.ne.jp] user:pass