我们现在要安装一个postfix,要求其支持web mail,并安装web mail实现邮箱的注册、邮件的发送接收。
一、安装配置DNS
参考:DNS的快速配置和安装
未完待续:
二、安装postfix前的准备工作
1.关闭sendmail
service sendmail stop
chkconfig sendmail off
2.安装编译环境(工具)
安装以下开发所用到的rpm包组:
Development Libraries
Development Tools
Legacy Software Development
X Software Development
yum -y groupinstall "Development Libraries" "Development Tools" "Legacy Software Development" "X Software Development"
3.安装所需的rpm包
包括:httpd, php, php-mysql, mysql, mysql-server, mysql-devel, openssl-devel, dovecot, perl-DBD-MySQL, tcl, tcl-devel, libart_lgpl, libart_lgpl-devel, libtool-ltdl, libtool-ltdl-devel, expect
yum -y install httpd php php-mysql mysql mysql-server mysql-devel openssl-devel dovecot perl-DBD-MySQL tcl tcl-devel libart_lgpl libart_lgpl-devel libtool-ltdl libtool-ltdl-devel expect
4.启动mysql数据库
service mysqld start
chkconfig mysqld on
5.启动saslauthd服务
service saslauthd start
chkconfig saslauthd on
准备工作完成
三、安装配置postfix
1.下载并解压postfix (可以在官网www.postfix.org下载)
tar xf postfix-2.6.5.tar.gz
2.添加用户和组
groupadd -g 2525 postfix
groupadd -g 2526 postdrop
useradd -g postfix -u 2525 -s /sbin/nologin -M postfix
useradd -g postdrop -u 2526 -s /sbin/nologin -M postdrop
2.编译安装
cd postfix-2.6.5
make makefiles 'CCARGS=-DHAS_MYSQL -I/usr/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/include/sasl -DUSE_TLS ' 'AUXLIBS=-L/usr/lib/mysql -lmysqlclient -lz -lm -L/usr/lib/sasl2 -lsasl2 -lssl -lcrypto'
make
make install
3.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:
Newaliases
4.编辑配置文件main.cf
cd /etc/postfix
cp main.cf main.cf.bak 备份main.cf
vim main.cf
修改以下几项为您需要的配置
myhostname = mail.zsl.com
myorigin = zsl.com
mydomain = zsl.com
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mynetworks = 192.168.19.0/24, 127.0.0.0/8
5.启动postfix
postfix start
6.拷贝一个已经写好的 postfix 到 /etc/init.d/postfix并启动postfix
chomd +x /etc/init.d/postfix
chkconfig --add postfix
chkconfig postfix on
OK!Postfix安装完成了。
四、为postfix开启基于cyrus-sasl的认证功能
1.验证postfix是否支持cyrus风格的sasl认证,如果您的输出为以下结果,则是支持的:
/usr/local/postfix/sbin/postconf -a
cyrus
dovecot
2.编辑配置文件main.cf
vim /etc/postfix/main.cf
添加以下内容:
############################CYRUS-SASL############################
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_invalid_h ostname,reject_non_fqdn_hostname,reject_unknown_sender_domain,reject_non_fqdn_sende r,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_pipelining,reje ct_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_application_name = smtpd
smtpd_banner = Welcome to our $myhostname ESMTP,Warning: Version not Available!
3.编辑/usr/lib/sasl2/smtpd.conf
vim /usr/lib/sasl2/smtpd.conf
添加如下内容:
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN
4.让postfix重新加载配置文件
/usr/sbin/postfix/sbin/postfix reload
OK!现在postfix可以使用cyrus-sasl认证了。
五、安装Courier authentication library
1.下载并解压courier-authlib-0.62.4.tar.bz2
tar jxvf courier-authlib-0.62.4.tar.bz2
2.编译安装
cd courier-authlib-0.62.4
./configure --prefix=/usr/local/courier-authlib --sysconfdir=/etc --with-authmysql --with-mysql-libs=/usr/lib/mysql --with-mysql-includes=/usr/include/mysql --with-redhat --with-authmysqlrc=/etc/authmysqlrc --with-authdaemonrc=/etc/authdaemonrc --with-ltdl-lib=/usr/lib --with-ltdl-include=/usr/include
make
make install
3.修改文件权限
chmod 755 /usr/local/courier-authlib/var/spool/authdaemon
4.修改配置文件/etc/authdaemonrc cp、/etc/authmysqlrc
cp /etc/authdaemonrc.dist /etc/authdaemonrc
cp /etc/authmysqlrc.dist /etc/authmysqlrc
修改/etc/authdaemonrc 文件
authmodulelist="authmysql"
authmodulelistorig="authmysql"
daemons=10
编辑/etc/authmysqlrc 为以下内容,其中2525,2525 为postfix 用户的UID和GID。
MYSQL_SERVER
MYSQL_PORT 3306 (指定你的mysql监听的端口,这里使用默认的3306)
MYSQL_USERNAME extmail (这时为后文要用的数据库的所有者的用户名)
MYSQL_PASSWORD extmail (密码)
MYSQL_SOCKET /var/lib/mysql/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)
5.配置/etc/init.d中加入courier-authlib并开机启动
cp courier-authlib.sysvinit /etc/init.d/courier-authlib
chmod 755 /etc/init.d/courier-authlib
chkconfig --add courier-authlib
chkconfig courier-authlib on
6.编辑默认库文件路径,并重新引导
vim /etc/ld.so.conf.d/courier-authlib.conf
写入
/usr/local/courier-authlib/lib/courier-authlib
ldconfig -v
7.启动服务
service courier-authlib start
8.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
9.接下来重新配置SMTP 认证,编辑 /usr/lib/sasl2/smtpd.conf ,确保其为以下内容:
pwcheck_method: authdaemond
log_level: 3
mech_list:PLAIN LOGIN
authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket
六、让postfix支持虚拟域和虚拟用户
1.编辑/etc/postfix/main.cf,添加如下内容:
########################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
2.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
cd extman-1.1/docs
mysql -u root -p <extmail.sql
mysql -u root -p <init.sql
cp mysql* /etc/postfix/
3.授予用户extmail访问extmail数据库的权限
mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';
mysql> GRANT all privileges on extmail.* TO extmail@127.0.0.1 IDENTIFIED BY 'extmail';
FLUSH PRIVILEGES;
说明:启用虚拟域以后,需要取消中心域,即注释掉myhostname, mydestination, mydomain, myorigin几个指令;当然,你也可以把mydestionation的值改为你自己需要的。
未完待续……
七、配置dovecot
1.编辑配置文件dovecot.conf
vim /etc/dovecot.conf
mail_location = maildir:/var/mailbox/%d/%n/Maildir
auth default {
mechanisms = plain
passdb sql {
args = /etc/dovecot-mysql.conf
}
userdb sql {
args = /etc/dovecot-mysql.conf
}
2.编辑dovecot-mysql.conf
vim /etc/dovecot-mysql.conf
driver = mysql
connect = host=localhost 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'
3.启动dovecot服务:
service dovecot start
chkconfig dovecot on