linux上安装基于postfix的全功能邮件服务器(2)
八、为postfix开启基于cyrus-sasl的认证功能
使用以下命令验正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
#vi /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_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_sasl_application_name = smtpd
smtpd_banner = Welcome to our $myhostname ESMTP,Warning: Version not Available!
#vi /usr/local/lib/sasl2/smtpd.conf
添加如下内容：
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN
让postfix重新加载配置文件
#/usr/local/postfix/sbin/postfix reload
九、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/spool/mail
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、添加为支持虚拟域和虚拟用户所用到的配置文件
编辑/etc/postfix/mysql_virtual_alias_maps.cf ，添加如下内容：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = alias
select_field = goto
where_field = address
编辑/etc/postfix/mysql_virtual_domains_maps.cf ，添加如下内容：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = domain
select_field = description
where_field = domain
编辑/etc/postfix/mysql_virtual_mailbox_limit_maps.cf ，添加如下内容：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = mailbox
select_field = quota
where_field = username
编辑/etc/postfix/mysql_virtual_mailbox_maps.cf ，添加如下内容：
user = extmail
password = extmail
hosts = localhost
dbname = extmail
table = mailbox
select_field = maildir
where_field = username
说明：
1、这里用到的数据库及用户的建立可以后文中的extmail说明部分来实现，您可以参照那一部分来理解这里指定的数据库及其用户名等；
2、以上新建文件亦可以从extman安装文件中获得，您也可以由此不用手动输入；
3、虚拟用户邮箱目录我这里沿用了/var/spool/mail，你可以指定为别的目录，比如常见到的/var/mailbox，或者/home/domains等；但如果这里做了修改，请在后文中用到时作了相应的修改；
十、安装Courier authentication library
http://jaist.dl.sourceforge.net/sourceforge/courier/courier-authlib-0.59.3.tar.bz2
# tar jxvf courier-authlib-0.59.3.tar.bz2
# cd courier-authlib-0.59.3
./configure \
--prefix=/usr/local/courier-authlib \
--sysconfdir=/etc \
--without-authpam \
--without-authldap \
--without-authpwd \
--without-authshadow \
--without-authvchkpw \
--without-authpgsql \
--with-authmysql \
--with-mysql-libs=/usr/local/mysql/lib/mysql \
--with-mysql-includes=/usr/local/mysql/include/mysql \
--with-redhat \
--with-authmysqlrc=/etc/authmysqlrc \
--with-authdaemonrc=/etc/authdaemonrc \
CFLAGS="-march=i686 -O2 -fexpensive-optimizations" \
CXXFLAGS="-march=i686 -O2 -fexpensive-optimizations"
# make
# make install
# chmod 755 /usr/local/courier-authlib/var/spool/authdaemon
# 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 localhost
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 /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/spool/mail/',maildir)
MYSQL_NAME_FIELD name
MYSQL_MAILDIR_FIELD concat('/var/spool/mail/',maildir)
# cp courier-authlib.sysvinit /etc/init.d/courier-authlib
# chmod 755 /etc/init.d/courier-authlib
# chkconfig --add courier-authlib
# chkconfig --level 2345 courier-authlib on
#echo "/usr/local/courier-authlib/lib/courier-authlib" >> /etc/ld.so.conf
# ldconfig -v
# service courier-authlib start (启动服务)
# netstat -antl|grep :25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN
十一、安装Courier-IMAP-4.1.3
http://nchc.dl.sourceforge.net/sourceforge/courier/courier-imap-4.1.3.tar.bz2
# tar jxvf courier-imap-4.1.3.tar.bz2
# cd courier-imap-4.1.3
# ./configure \
--prefix=/usr/local/courier-imap \
--with-redhat \
--enable-unicode \
--disable-root-check \
--with-trashquota \
--without-ipv6 \
CPPFLAGS='-I/usr/local/ssl/include/openssl -I/usr/local/courier-authlib/include' \
LDFLAGS='-L/usr/local/courier-authlib/lib/courier-authlib' \
COURIERAUTHCONFIG='/usr/local/courier-authlib/bin/courierauthconfig'
# make
##############出现错误start@@@@@@@@@@@@@@@@@@@
./.libs/libcouriertls.a(libcouriertls.o): In function `init_session_cache':
/usr/local/courier-imap-4.1.3/tcpd/libcouriertls.c:590: undefined reference to `SSL_CTX_sess_set_new_cb'
/usr/local/courier-imap-4.1.3/tcpd/libcouriertls.c:591: undefined reference to `SSL_CTX_sess_set_get_cb'
/usr/local/courier-imap-4.1.3/tcpd/libcouriertls.c:592: undefined reference to `SSL_CTX_sess_set_remove_cb'
collect2: ld returned 1 exit status
make[3]: *** [couriertls] 错误 1
make[3]: Leaving directory `/usr/local/courier-imap-4.1.3/tcpd'
make[2]: *** [all] 错误 2
make[2]: Leaving directory `/usr/local/courier-imap-4.1.3/tcpd'
make[1]: *** [all-recursive] 错误 1
make[1]: Leaving directory `/usr/local/courier-imap-4.1.3'
make: *** [all] 错误 2
解决方法：更新了openssl到openssl-0.9.8f
ps：极有可能是我openssl-0.9.8e没有装好
tar zxvf openssl-0.9.8f.tar.gz
cd openssl-0.9.8f
./config shared zlib
make
make test
make install
#不再备份是因为之前已经备份！
rm -rf /usr/bin/openssl
rm -rf /usr/include/openssl
rm /usr/lib/libssl.so
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
ln -sv /usr/local/ssl/lib/libssl.so.0.9.8 /usr/lib/libssl.so
终于可以通过make
##############出现错误end@@@@@@@@@@@@@@@@@@@
# make install
# cp /usr/local/courier-imap/etc/imapd.dist /usr/local/courier-imap/etc/imapd
# cp /usr/local/courier-imap/etc/imapd-ssl.dist /usr/local/courier-imap/etc/imapd-ssl
# cp /usr/local/courier-imap/etc/pop3d.dist /usr/local/courier-imap/etc/pop3d
# cp /usr/local/courier-imap/etc/pop3d-ssl.dist /usr/local/courier-imap/etc/pop3d-ssl
配置Courier-IMAP，为用户提供pop3服务：
vi /usr/local/courier-imap/etc/pop3d
POP3DSTART=YES
注：如果你想为用户提供IMAP服务，则需在"/usr/local/courier-imap/etc/imapd"文件中设置"IMAPDSTART=yes"；其它类同；
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/spool/mail
#chown postfix -R /var/spool/mail
#cp courier-imap.sysvinit /etc/rc.d/init.d/courier-imapd
#chmod 755 /etc/rc.d/init.d/courier-imapd
#chkconfig --add courier-imapd
#chkconfig --level 2345 courier-imapd on
#service courier-imapd start
接下来重新配置SMTP 认证，编辑 /usr/local/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
十二、安装Extmail-1.0.2
http://www.extmail.org/cgi-bin/download.cgi
1、安装
# tar zxvf extmail-1.0.2.tar.gz
# mkdir -pv /var/www/extsuite
# mv extmail-1.0.2 /var/www/extsuite/extmail
# cp /var/www/extsuite/extmail/webmail.cf.default /var/www/extsuite/extmail/webmail.cf
2、修改主配置文件
#vi /var/www/extsuite/extmail/webmail.cf
部分修改选项的说明：
SYS_MESSAGE_SIZE_LIMIT = 5242880
用户可以发送的最大邮件
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(要根据签名postfix的位置一致)：
SYS_MAILDIR_BASE = /var/spool/mail
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 = postfix
SYS_MYSQL_PASS = 123456
SYS_MYSQL_HOST = localhost
指明数据库服务器主机名，这里默认即可
SYS_MYSQL_SOCKET = /var/lib/mysql/mysql.sock
连接数据库的sock文件位置，这里修改为：
SYS_MYSQL_SOCKET = /tmp/mysql.sock
SYS_MYSQL_TABLE = mailbox
SYS_MYSQL_ATTR_USERNAME = username
SYS_MYSQL_ATTR_DOMAIN = domain
SYS_MYSQL_ATTR_PASSWD = password
以上用来指定验正用户登录里所用到的表，以及用户名、域名和用户密码分别对应的表中列的名称；这里默认即可
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
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