CentOS 6 使用Postfix 和Dovecot 搭建邮件服务器

本文介绍如何在用Postfix 和Dovecot 在CentOS 6 上搭建一个 POP3/IMAP/SMTP 邮件服务器。你可能不知道啥子是Postfix,这货是Sendmail的完美替代品,sendmail不但发信慢,而且还容易堆积一堆邮件,消耗服务器资源。Postfix不但速度快,而且容易管理,还更安全。

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升级系统

screen -U -S mailserver-screen
yum update

创建用户组

groupadd vmail -g 2222

创建用户

useradd vmail -r -g 2222 -u 2222 -d /var/vmail -m -c "mail user"

安装Postfix

yum remove exim sendmail
yum install postfix cronie

修改postfix 配置文件 main.cf

cp /etc/postfix/main.cf{,.orig}
vim /etc/postfix/main.cf
myhostname = fatesinger.com
mydomain = fatesinger.com
myorigin = $mydomain
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/postfix/aliases
alias_database = $alias_maps
inet_interfaces = all
inet_protocols = ipv4
mydestination = $myhostname, localhost.$mydomain, localhost
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-2.6.6/samples
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
relay_domains = *
virtual_alias_maps=hash:/etc/postfix/vmail_aliases
virtual_mailbox_domains=hash:/etc/postfix/vmail_domains
virtual_mailbox_maps=hash:/etc/postfix/vmail_mailbox
virtual_mailbox_base = /var/vmail
virtual_minimum_uid = 2222
virtual_transport = virtual
virtual_uid_maps = static:2222
virtual_gid_maps = static:2222
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = /var/run/dovecot/auth-client
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_local_domain = $mydomain
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination

创建vmail_domains配置文件

vim /etc/postfix/vmail_domains
mydomain.com            OK
my-otherdomain.com      OK

创建vmail_mailbox配置文件

vim /etc/postfix/vmail_mailbox
info@mydomain.com           mydomain.com/info/
info@my-otherdomain.com     my-otherdomain.com/info/

创建vmail_aliases配置文件

vim /etc/postfix/vmail_aliases
info@mydomain.com           info@mydomain.com
info@my-otherdomain.com     foo@bar.tld

hash 配置文件

postmap /etc/postfix/vmail_domains
postmap /etc/postfix/vmail_mailbox
postmap /etc/postfix/vmail_aliases
touch /etc/postfix/aliases
vim +/submission /etc/postfix/master.cf
submission inet n       -       n       -       -       smtpd

安装DOVECOT

yum install dovecot

修改dovecot的配置文件dovecot.conf

cp /etc/dovecot/dovecot.conf{,.orig}
vim /etc/dovecot/dovecot.conf
listen = *
ssl = no
protocols = imap lmtp
disable_plaintext_auth = no
auth_mechanisms = plain login
mail_access_groups = vmail
default_login_user = vmail
first_valid_uid = 2222
first_valid_gid = 2222
#mail_location = maildir:~/Maildir
mail_location = maildir:/var/vmail/%d/%n

passdb {
    driver = passwd-file
    args = scheme=SHA1 /etc/dovecot/passwd
}
userdb {
    driver = static
    args = uid=2222 gid=2222 home=/var/vmail/%d/%n allow_all_users=yes
}
service auth {
    unix_listener auth-client {
        group = postfix
        mode = 0660
        user = postfix
    }
    user = root
}
service imap-login {
  process_min_avail = 1
  user = vmail
}

创建虚拟用户的密码文件。用户名和密码会储存在这里。

touch /etc/dovecot/passwd
doveadm pw -s sha1 | cut -d '}' -f2
vim /etc/dovecot/passwd
info@mydomain.com:DOzcsKI8HY0bg8LAuz0DPKwS3WA=
chown root: /etc/dovecot/passwd
chmod 600 /etc/dovecot/passwd

启动服务

chkconfig postfix on
chkconfig dovecot on
service postfix restart
service dovecot restart

如果是centos7 则使用如下命令

systemctl enable postfix.service
systemctl enable dovecot.service
systemctl start  postfix.service
systemctl start  dovecot.service

之后就可以测试收发邮件了。

Bigfa

computer loser

Countine Reading

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Comments : 2

  1. 测试邮件总是密码错误。。
    535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
    尝试修改了几次密码 :cry:

    1. @lock telnet测试发送已经显示
      250 2.0.0 Ok: queued as 86AAF1903E5
      但是就是收不到邮件,wordpress smtp插件也不能发送 :cry:

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