CentOS6, dovecot, postfixで仮想ドメイン環境

■OS CentOS 6.5

■ソフト

dovecot postfixのインストール、設定

yum install epel-release
yum install dovecot postfix vim

cp -frp /etc/dovecot{,.default}
cp -frp /etc/postfix{,.default}

vim /etc/postfix/main.cf

...
inet_interfaces = all
#inet_interfaces = $myhostname
#inet_interfaces = $myhostname, localhost
#inet_interfaces = localhost
...
#末尾に下記を追加
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination

virtual_mailbox_domains = 
virtual_mailbox_maps = hash:/etc/postfix/virtual-mailbox
virtual_uid_maps = static:10000
virtual_gid_maps = static:10000
virtual_mailbox_base = /var/spool/virtual                                                                         

vim /etc/dovecot/dovecot.conf 

# Protocols we want to be serving.
protocols = pop3

vim /etc/dovecot/conf.d/10-auth.conf

auth_mechanisms = cram-md5 plain
!include auth-passwdfile.conf.ext
!include auth-static.conf.ext
disable_plaintext_auth = no

vim /etc/dovecot/conf.d/10-master.conf 

service auth {
...
  # Postfix smtp-auth
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
    user = postfix
    group = postfix
  }
...
}

vim /etc/dovecot/conf.d/auth-passwdfile.conf.ext

passdb {
    driver = passwd-file
    args = scheme=CRAM-MD5 username_format=%u /etc/dovecot/passwd
}
userdb {
    driver = passwd-file
    args = uid=10000 gid=10000 username_format=%u /etc/dovecot/passwd
}

vim /etc/dovecot/conf.d/10-mail.conf

#mail_location = 
mail_location = maildir:/var/spool/virtual/%d/%n

vim /etc/dovecot/conf.d/auth-static.conf.ext 

userdb {
    driver = static
    args = uid=10000 gid=10000 home=/var/spool/virtual/%d/%n
}

groupadd -g 10000 mailuser
useradd  -s /sbin/nologin -M -u 10000 -g mailuser mailuser

ユーザーとドメインの追加

vim /etc/dovecot/passwd

user2@yourhost1.com:{CRAM-MD5}5101460cd0013e0d79945c734e048176d135b473766ff3ae18e5254432adc0e9
user3@yourhost1.com:{CRAM-MD5}5101460cd0013e0d79945c734e048176d135b473766ff3ae18e5254432adc0e9
user1@yourhost2.com:{CRAM-MD5}5101460cd0013e0d79945c734e048176d135b473766ff3ae18e5254432adc0e9
user2@yourhost2.com:{CRAM-MD5}5101460cd0013e0d79945c734e048176d135b473766ff3ae18e5254432adc0e9

ここでのパスワードは下記コマンドで取得します

doveadm pw

vim /etc/postfix/main.cf

virtual_mailbox_domains = yourhost1.com
                          yourhost2.com

vim /etc/postfix/virtual-mailbox

user2@yourhost1.com      yourhost1.com/user2/
user3@yourhost1.com      yourhost1.com/user3/
user1@yourhost2.com     yourhost2.com/user1/
user2@yourhost2.com     yourhost2.com/user2/

postmap /etc/postfix/virtual-mailbox
mkdir -p /var/spool/virtual/{yourhost1.com/,yourhost2.com}/{user1,user2}
chown -R mailuser: /var/spool/virtual

service postfix restart
service dovecot restart

参考サイト：

• http://qiita.com/dribble13/items/36847b944caed440d714
• http://www.unix-power.net/linux/centos_postfix_virtual.html

そもそもつながらない場合は一時的にSelinuxとFirewallを無効にして確認してみる。