Extmail:实现基于虚拟账号的web邮件系统

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Extmail:实现基于虚拟账号的web邮件系统

科技小能手 2017-11-12 17:33:00 浏览1207
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      在这篇博客中小编要实现一个基于虚拟账号的邮件系统,读者日常生活中所用到的邮件账号都是虚拟账号,并不是登陆系统的账户,这些虚拟的账号存储在数据库中集中管理,今天小编要实现如下工作流程的邮件系统

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各部分的功能:

MUA:可以使用客户端软件或者浏览器进行收发邮件但是都要结合认证,要实现浏览器访问,服务器必须搭建相应的站点,这里就使用了extmail,extman作为管理工具(域和用户的管理)

MTA:发送信件,这里小编使用源码postfix实现(老版的不支持mysql扩展),当然这里还要结合简单认证安全层(sasl,使用cyrus-sasl实现)和courier-authlib才能够最终和mysql联系起来

MRA:接收信件,小编这里使用dovecot来实现

软件需求

所需的源码包:courier-authlib-0.63.0.tar、extmail-1.2.tar、extman-1.1.tar、postfix-2.10.tar、Unix-Syslog-1.1.tar(源码包均来自互联网,如有需要可自行下载)

还需要系统自带的rpm包,这里可以使用yum安装

yum install -y mysql openssl-devel perl-DBD-MySQL tcl tcl-devel libart_lgpl libart_lgpl-devel libtool-ltdl libtool-ltdl-devel expect

Step 1.网卡以及主机名参数设置

# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=none

ONBOOT=yes

NETMASK=255.255.255.0

IPADDR=192.168.111.10

# vim /etc/sysconfig/network

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=mail.zzu.com

Step 2.搭建web服务器

Apr安装

# tar -jxf apr-1.4.6.tar.bz2 -C /usr/local/src/

# cd /usr/local/src/apr-1.4.6/

# ./configure

# make && make install

Apr-util安装

# tar -jxf apr-util-1.5.2.tar.bz2 -C /usr/local/src/

# cd /usr/local/src/apr-util-1.5.2/

# ./configure --with-apr=/usr/local/src/apr-1.4.6/apr-1-config(加上apr的路径)

# make && make install

Pcre安装

# unzip pcre-8.32.zip

# cd pcre-8.32

# ./configure

# make && make install

安装apache

# tar -jxf httpd-2.4.4.tar.bz2 -C /usr/local/src/

./configure --prefix=/usr/local/apache --with-apr=/usr/local/apr/bin/apr-1-config --with-pcre=/usr/local/pcre/

# make && make install

编写启动脚本

# vim httpd

#!/bin/bash

# chkconfig: 35 80 30

# description: Apache server

HTTPD='/usr/local/apache/bin/httpd'

LOCKFILE='/var/lock/subsys/httpd'

. /etc/init.d/functions

function start(){

[ -e $LOCKFILE ] && echo "httpd is running ......." && exit

echo -n "httpd is starting ......"

sleep 1

`$HTTPD -k start`

}

function stop(){

echo -n "httpd is stoping......"

sleep 1

killproc $HTTPD &>/dev/null

}

function status(){

[ -e $LOCKFILE ]&& echo "httpd is running ......" || echo "httpd is stoped"

}

case $1 in

start)

start

;;

stop)

stop

;;

restart)

stop

start

;;

status)

status

;;

*)

echo "httpd Usage: {start|stop|restart}"

;;

esac

# cp httpd /etc/init.d/

# chmod a+x /etc/init.d/httpd

# chkconfig --add httpd

# chkconfig httpd on

# service httpd start

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Step 3.Mysql的安装

# groupadd mysql

# useradd -r -g mysql mysql

# cd /usr/local

# tar zxvf /path/to/mysql-VERSION-OS.tar.gz

# ln -s mysql-advanced-5.6.10-linux-glibc2.5-i686/ mysql

# cd mysql

# chown -R mysql .

# chgrp -R mysql .

# scripts/mysql_install_db --user=mysql

# chown -R root .

# chown -R mysql data

# cp support-files/my-default.cnf /etc/my.cnf

# bin/mysqld_safe --user=mysql &

# cp support-files/mysql.server /etc/init.d/mysqld

# chkconfig --add mysqld

# chkconfig mysqld on

# ln –s /usr/local/mysql/lib /usr/lib/mysql

# ln -s /usr/local/mysql/include/ /usr/include/mysql

# vim /etc/bashrc //在文件最后加入下面的内容

export PATH=/usr/local/mysql/bin:$PATH

# . /etc/bashrc

启动mysql测试

# service mysqld start

# mysqladmin -u root password 123456 //修改初始密码

# mysql -u root –p

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mysql> grant all on *.* to 'root'@'%' idenfied by '123456'; //赋予root用户最高权限

mysql> flush privileges; //刷新权限

Step 4.搭建DNS 服务器

# yum install bind bind-chroot caching-nameserver –y

# cd /var/named/chroot/etc/

创建配置文件

# cp -p named.caching-nameserver.conf named.conf

# vim named.conf

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# vim named.rfc1912.zones

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# cd ../var/named/

添加域文件

# cp -p localhost.zone zzu.com.zone

# vim zzu.com.zone

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# echo “nameserver 192.168.111.10” > /etc/resolv.conf //修改DNS指向

# chkconfig named on

启动DNS服务器

# service named start

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Step 5.安装配置postfix

之所以要使用源码安装是因为5.4自带的postfix不支持mysql的扩展啦

添加postfix用户

# groupadd -g 2525 postfix

# useradd -g postfix -u 2525 -s /sbin/nologin -M postfix

# groupadd -g 2526 postdrop

# useradd -g postdrop -u 2526 -s /bin/false -M postdrop

解压缩源码

# tar -zxvf postfix-2.10.0.tar.gz -C /usr/local/src/

# cd /usr/local/src/postfix-2.10.0/

# make makefiles 'CCARGS=-DHAS_MYSQL -I/usr/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/include/sasl -DUSE_TLS ' 'AUXLIBS=-L/usr/local/mysql/lib -lmysqlclient -lz -lm -L/usr/lib/sasl2 -lsasl2 -lssl -lcrypto'

这里安装前需要提示一下,可能缺少libpcre.so.1,这样解决

ln -s /usr/local/lib/libpcre.so.1 /usr/lib

# make install

install_root: [/]

tempdir: [/usr/local/src/postfix-2.10.0] /tmp

config_directory: [/etc/postfix]

command_directory: [/usr/sbin]

daemon_directory: [/usr/libexec/postfix]

data_directory: [/var/lib/postfix]

html_directory: [no]

mail_owner: [postfix]

mailq_path: [/usr/bin/mailq]

newaliases_path: [/usr/bin/newaliases]

queue_directory: [/var/spool/postfix]

readme_directory: [no]

sendmail_path: [/usr/sbin/sendmail]

setgid_group: [postdrop]

# postfixconf -m

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# newaliases 生成别名二进制文件,这个步骤如果忽略,会造成postfix效率极低

安装是完成了,可是没有启动脚本啊,这个好解决,可以将源码rpm包中的脚本提取出来就是了

# mkdir tmp

# cd tmp/

# cp /mnt/cdrom/Server/postfix-2.3.3-2.1.el5_2.i386.rpm .

# rpm2cpio postfix-2.3.3-2.1.el5_2.i386.rpm |cpio –id

# cd etc/rc.d/init.d/

# cp postfix /etc/init.d/

# chkconfig --add postfix

# chkconfig postfix on

好啦,启动脚本算是做完了

# vim /etc/postfix/main.cf

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说明:

myorigin参数用来指明发件人所在的域名;

mydestination参数指定postfix接收邮件时收件人的域名,即您的postfix系统要接收到哪个域名的邮件;

myhostname 参数指定运行postfix邮件系统的主机的主机名,默认情况下,其值被设定为本地机器名;

mydomain参数指定您的域名,默认情况下,postfix将myhostname的第一部分删除而作为mydomain的值;

mynetworks 参数指定你所在的网络的网络地址,postfix系统根据其值来区别用户是远程的还是本地的,如果是本地网络用户则允许其访问

启动postfix试试

# service postfix start

# netstat -tupln |grep master

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测试一下是否能发信

先添加两个测试账户

# useradd user1

# echo '123456' | passwd --stdin user1

# useradd user2

# echo '123456' | passwd --stdin user2

集中测试

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Step 6.安装cyrus-sasl,开启postfix的账户认证功能

# yum install cyrus-sasl

# chkconfig saslauthd on

修改postfix的main.cf文件,添加一下内容

############################CYRUS-SASL############################ 
broken_sasl_auth_clients = yes 
smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_invalid_hostname,reject_non_fqdn_hostname,reject_unknown_sender_domain,reject_non_fqdn_sender,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_pipelining,reject_unauth_destination 
smtpd_sasl_auth_enable = yes 
smtpd_sasl_local_domain = $myhostname 
smtpd_sasl_security_options = noanonymous 
smtpd_banner = Welcome to our $myhostname ESMTP,Warning: Version not Available!

# vim /usr/lib/sasl2/smtpd.conf

pwcheck_method: saslauthd

mech_list: PLAIN LOGIN

重新启动认证服务

# service saslauthd start

# service postfix restart

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Step 7.安装配置courier-authlib

# tar -jxvf courier-authlib-0.63.0.tar.bz2 -C /usr/local/src/

#./configure --prefix=/usr/local/courier-authlib --sysconfdir=/etc --with-authmysql --with-mysql-libs=/user/lib/mysql --with-mysql-includes=/usr/include/mysql --with-authmysqlrc=/etc/authmysqlrc --with-authdaemonrc=/etc/authdaemonrc --with-ltdl-lib=/usr/lib --with-ltdl-include=/usr/include --with-sqlite-libs=/usr/lib --with-sqlite-includes=/usr/include

# make && make install

# chmod 755 /usr/local/courier-authlib/var/spool/authdaemon 
# cp courier-authlib.sysvinit /etc/init.d/courier-authlib //创建启动脚本

# chmod 755 /etc/init.d/courier-authlib

# chkconfig --add courier-authlib

# chkconfig courier-authlib on

# cp /etc/authdaemonrc.dist /etc/authdaemonrc

# cp /etc/authmysqlrc.dist /etc/authmysqlrc

安装是算完成了

修改文件/etc/authdaemonrc

# vim /etc/authdaemonrc

authmodulelist="authmysql"

authmodulelistorig="authmysql"

daemons=10

# vim /etc/authmysqlrc

MYSQL_SERVER 192.168.111.10

MYSQL_PORT 3306

MYSQL_USERNAME extmail

MYSQL_PASSWORD extmail

MYSQL_SOCKET /tmp/mysql.sock

MYSQL_DATABASE extmail

MYSQL_USER_TABLE mailbox

MYSQL_CRYPT_PWFIELD password

MYSQL_UID_FIELD '2525'

MYSQL_GID_FIELD '2525'

MYSQL_LOGIN_FIELD username

MYSQL_HOME_FIELD concat('/var/mailbox/',homedir)

MYSQL_NAME_FIELD name

MYSQL_MAILDIR_FIELD concat('/var/mailbox/',maildir)

# echo "/usr/local/courier-authlib/lib/courier-authlib" >> /etc/ld.so.conf.d/courier-authlib.conf

# ldconfig –v

# service courier-authlib start

新建虚拟用户邮箱所在的目录,并将其权限赋予postfix用户:

# mkdir -pv /var/mailbox

# chown -R postfix /var/mailbox

重新配置SMTP 认证,编辑 /usr /lib/sasl2/smtpd.conf ,修改为一下内容

# vim /usr/lib/sasl2/smtpd.conf

pwcheck_method: authdaemond

log_level: 3

mech_list:PLAIN LOGIN

authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket

好了courier-authlib算是配置完成了

Step 8.配置postfix,让其支持虚拟域和虚拟用户

# vim /etc/postfix/main.cf

########################Virtual Mailbox Settings########################

virtual_mailbox_base = /var/mailbox

virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf

virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf

virtual_alias_domains =

virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf

virtual_uid_maps = static:2525

virtual_gid_maps = static:2525

virtual_transport = virtual

maildrop_destination_recipient_limit = 1

maildrop_destination_concurrency_limit = 1

##########################QUOTA Settings########################

message_size_limit = 14336000

virtual_mailbox_limit = 20971520

virtual_create_maildirsize = yes

virtual_mailbox_extended = yes

virtual_mailbox_limit_maps=mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf

virtual_mailbox_limit_override = yes

virtual_maildir_limit_message = Sorry, the user's maildir has overdrawn his diskspace quota, please Tidy your mailbox and try again later.

virtual_overquota_bounce = yes

使用extman源码目录下docs目录中的extmail.sql和init.sql建立数据库:

# tar -zxvf extman-1.1.tar.gz -C /usr/local/src/

# cd /usr/local/src/extman-1.1/docs

这里有两个sql脚本需要导入 extmail.sql和init.sql

但是要注意直接导入extmail.sql是会出现错误,小编这里稍作修改就是了

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修改之后

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并且还要将每个创建表语句后面的TYPE=MyISAM 和后面的内容删掉

# mysql -u root -p <extmail.sql

# mysql -u root -p <init.sql

# cp mysql* /etc/postfix/

这里做好授权工作

重启postfix

# service postfix restart

Step 9.配置dovecot

# vim /etc/dovecot.conf

增加一行:

mail_location = maildir:/var/mailbox/%d/%n/Maildir

注释掉796、829、25257、25264行

打开870、872、874行,修改872行:

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打开931、933、934行,修改933行:

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# vim /etc/postfix/main.cf

取消home_mailbox = Maildir/前的注释

编辑新文件dovecot-mysql.conf

# vim /etc/dovecot-mysql.conf

添加一下内容 
driver = mysql

connect = host=192.168.111.10 dbname=extmail user=extmail password=extmail

default_pass_scheme = CRYPT

password_query = SELECT username AS user,password AS password FROM mailbox WHERE username = '%u'

user_query = SELECT maildir, uidnumber AS uid, gidnumber AS gid FROM mailbox WHERE username = '%u'

启动dovecot

# service dovecot start

# chkconfig dovecot on

Step 10.安装extmail

# tar -zxvf extmail-1.2.tar.gz -C /usr/local/src/

# cd /usr/local/src/

# mkdir -pv /var/www/extsuite //建立用于存放extmail的物理目录

# mv extmail-1.2 /var/www/extsuite/extmail

创建配置文件

# cp /var/www/extsuite/extmail/webmail.cf.default /var/www/extsuite/extmail/webmail.cf

修改配置文件

# vim /var/www/extsuite/extmail/webmail.cf

SYS_USER_LANG = en_US

语言选项,可改作:

SYS_USER_LANG = zh_CN

SYS_MAILDIR_BASE = /home/domains

此处即为您在前文所设置的用户邮件的存放目录,可改作:

SYS_MAILDIR_BASE = /var/mailbox

SYS_MYSQL_USER = db_user

SYS_MYSQL_PASS = db_pass

以上两句句用来设置连接数据库服务器所使用用户名、密码和邮件服务器用到的数据库,这里修改为:

SYS_MYSQL_USER = extmail

SYS_MYSQL_PASS = extmail

SYS_AUTHLIB_SOCKET = /var/spool/authdaemon/socket

此句用来指明authdaemo socket文件的位置,这里修改为:

SYS_AUTHLIB_SOCKET = /usr/local/courier-authlib/var/spool/authdaemon/socket

# chown -R postfix.postfix /var/www/extsuite/extmail/cgi/

这里还不算完,这里还要给日志系统打个补丁

# tar -zxvf Unix-Syslog-1.1.tar.gz -C /usr/src/

[root@mail ~]# cd /usr/local/src/Unix-Syslog-1.1/

[root@mail Unix-Syslog-1.1]# perl Makefile.PL

[root@mail Unix-Syslog-1.1]# make && make install

配置extman

# cd /usr/local/src/

# mv extman-1.1 /var/www/extsuite/extman

# cp /var/www/extsuite/extman/webman.cf.default /var/www/extsuite/extman/webman.cf

# vim /var/www/extsuite/extman/webman.cf

SYS_MAILDIR_BASE = /home/domains

此处即为您在前文所设置的用户邮件的存放目录,可改作:

SYS_MAILDIR_BASE = /var/mailbox

修改

SYS_CAPTCHA_ON = 1

SYS_CAPTCHA_ON = 0

SYS_MYSQL_SOCKET = /tmp/mysql.sock

修改cgi目录的属主:

# chown -R postfix.postfix /var/www/extsuite/extman/cgi/

好了两个站点的物理目录算是搭建好了,接下来要和apache配合起来

# vim /usr/local/apache/conf/httpd.conf //因为是源码安装的

User postfix

Group postfix

在最后添加如下内容:

<Directory /var/www/extsuite/extmail>

Order deny,allow

Allow from all

Require all granted

</Directory>

<Directory /var/www/extsuite/extman>

Order deny,allow

Allow from all

Require all granted

</Directory>

<VirtualHost 192.168.101.10:80>

ServerName mail.zzu.com

DocumentRoot /var/www/extsuite/extmail/html/

ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi

Alias /extmail /var/www/extsuite/extmail/html

ScriptAlias /extman/cgi /var/www/extsuite/extman/cgi

Alias /extman /var/www/extsuite/extman/htm

</VirtualHost>

最重要的一点要打开cgi的支持

LoadModule cgid_module modules/mod_cgid.so

# mkdir -pv /tmp/extman

# chown postfix.postfix /tmp/extman

重新启动apache

# service httpd restart

# yum install perl-DBD-mysql

最后测试的时候小编发现还要在mysql中执行一条授权语句

sql >grant all on *.* to 'webman'@'mail.zzu.com' identified by 'webman';

sql > flush privileges;

Step 11.集中测试

在客户机浏览器输入http://mail.zzu.com (客户机的DNS指向192.168.111.10)

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默认的用户名为:root@extmail.org密码为:extmail*123*

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这里还要注意小编使用的mysql版本比较高,注册的时候会出错,还记得当初导入表的时候已经做过修改么,这里还要进行一项修改

mysql > use extmail

mysql > alter table domain

> modify can_signup varchar(1);

但是貌似新建域的过程中的允许自由注册选项没法生效,读者可以再修改一下

退出到主页,注册用户

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注册两个用户user1和user2

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登陆user1发信测试

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退出登陆,切换到user2收信试试

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打开信件看消息

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再回复试试

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User1的收信情况

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到此整个邮件系统就算搭建完成了

如果在搭建过程中出现问题,请及时联系小编哈



本文转自 chenming421  51CTO博客,原文链接:http://blog.51cto.com/wnqcmq/1192457

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