postfix邮件服务器搭建

一、系统环境要求

操作系统:centos 7 X64

二、关闭sendmail

1、/bin/systemctl stop  sendmail.service
2、chkconfig sendmail off(关闭开机自启动)

三、安装postfix、dovecot

yum -y install postfix dovecot

四、修改/etc/postfix/main.cf内如如下:

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
myhostname = mail.shushujia.net
mydomain = shushujia.net
myorigin = $mydomain
inet_interfaces = all
inet_protocols = all
mydestination = shushujia.net
unknown_local_recipient_reject_code = 550

relay_domains = shushujia.net
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
home_mailbox = Maildir/
mail_spool_directory = /var/spool/mail
debug_peer_level = 2
debugger_command =
     PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
     ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.10.1/samples
readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = ''
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination
broken_sasl_auth_clients = yes
smtpd_client_restrictions = permit_sasl_authenticated
smtpd_sasl_security_options = noanonymous
mynetworks = 114.215.137.209,127.0.0.0/8 #填写主机外网IP地址

五、修改dovecot配置文件如下:

1、/etc/dovecot/dovecot.conf
    protocols = imap pop3 lmtp
    listen = *
    base_dir = /var/run/dovecot/
    login_trusted_networks = 0.0.0.0/0
    log_path = /var/log/dovecot.log
    dict {
    }
    !include conf.d/*.conf
    !include_try local.conf

2、/etc/dovecot/conf.d/10-mail.conf
    mail_location = maildir:~/Maildir
    mbox_write_locks = fcntl
    namespace inbox {
      inbox = yes
    }
    mbox_write_locks = fcntl

六、修改/etc/pam.d/dovecot,支持系统用户认证

#%PAM-1.0
auth       required     pam_nologin.so
auth       include      password-auth
account    include      password-auth
session    include      password-auth
auth  include  system-auth
account  include  system-auth
session  include  system-auth

七,修改/etc/sysconfig/saslauthd如下:

SOCKETDIR=/run/saslauthd
MECH=shadow
FLAGS=

八、启动postfix,dovecot,saslauthd

/bin/systemctl start  postfix.service
/bin/systemctl start  dovecot.service
/bin/systemctl start  saslauthd.service

九、防火墙开放端口110,25,143

iptables -A INPUT -p tcp -m tcp --dport 25 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 110 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 143 -j ACCEPT

十、创建邮箱用户

由于用户服务器支持认证系统用户,因此直接创建系统用户即可
创建用户:useradd username �Cs /sbin/nologin(禁用远程登录权限)
用户授权:echo"password" | passwd--stdin username

十一、域名邮件记录解析

登录域名提供商网站,添加域名MX记录、A记录、TXT记录


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