FreeBSD7.0邮件构架

FreeBSD7.0+postfix+sasl2+mysql+maildrop+ExtMan+Mailman+ClamAv完全安装
本文参考了http://www.extmail.org/docs/extmail_solution_freebsd/

整个邮件解决方案由如下软件组成:
功能模块 内容 备注
操作系统(OS) FreeBSD FreeBSD是一个优秀的unix操作系统,基于宽松的BSD协议
邮件传输代理(MTA) Postfix 使用2.4.x,ports中的postfix已经是最新的2.4版
数据库/目录服务 mysql 5.0 可选MySQL或其他mysql ,本文以mysql5.0为蓝本
邮件投递代理(MDA) maildrop 2.0.x 支持过滤和强大功能
Web帐户管理后台 ExtMan-0.2.3 支持无限域名、无限用户
POP3 服务器 Courier-IMAP 支持pop3/pop3s/imap/imaps,功能强大,可根据需要选择
WebMail 系统 ExtMail-1.0.3 支持多语言、全部模板化,功能基本齐全
防病毒软件(Anti-Virus) ClamAV 0.92 最热门的开源杀毒软件
内容过滤器 Amavisd-new 2.5.x Content-Filter软件,支持与clamav/sa的挂接
内容级别的反垃圾邮件工具 SpamAssassin 著名的SA,可以支持大量规则,但速度较慢
SMTP认证库 Cyrus SASL 2.1x 标准的SASL实现库,可以支持Courier authlib
其他数据认证库 Courier Authlib 0.60 authlib是maildrop, courier-imap等服务的关键部件
日志分析及显示 mailgraph_ext 在ExtMan中已经包含了
Web 服务器 Apache 2.2.x 最新版的apache服务器,默认支持ssl模块
maillist软件 Mailman2.1.x 功能强大的邮件列表软件,支持基于web的管理

操作系统安装
操作系统的安装建议参考FreeBSD Handbook,在此仅给出链接,以避免不必要的重复劳动:

英文版
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/install.html
中文版
http://cnsnap.cn.freebsd.org/doc/zh_CN.GB2312/books/handbook/install.html

安装时的注意事项
1,磁盘分区

由于是邮件系统,相关的日志和queue都会保存在var分区内,因此var分区要有足够的空间。以一块硬盘73G/内存3G的服务器为例,可做如下分区:

/ 512m
swap 4096m
/var 5g
/tmp 512m
/usr 8g(尽量保证有10G左右)
/home 50g(剩下所有的空间)

2,软件包的选择

我们的邮件系统是要对外服务的,所以尽可能少的选择软件包,安装时建议选择Minimal,然后进入Custom选择doc,info,man,src即可。

配置

1,编辑/etc/rc.conf确保有如下内容:

sshd_enable=”YES”
named_enable=”YES”
sendmail_enable=”NONE”

编辑/etc/resolv.conf确保第一条nameserver记录是127.0.0.1,这样本地DNS缓存才有效,类似如下:
domain xxxxx.cn
nameserver 127.0.0.1
nameserver 202.106.0.20

然后执行如下命令:
/etc/rc.d/named start

2,根据硬件的配置重新编译内核,编译内核的办法参考FreeBSD Handbook,这里只给出链接:

英文版
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
中文版
http://cnsnap.cn.freebsd.org/doc/zh_CN.GB2312/books/handbook/kernelconfig.html
编译后系统的性能将得到较大的提升.

更新ports
根据你的情况执行

cvsup -gL2 /usr/share/examples/cvsup/ports-supfile -h cvsup.freebsdchina.org
或者
portsnap fetch && portsnap update

下载配置包
基本假定
整个系统的安装全过程都要求以root身份执行。并能够访问Internet。

安装前的准备

增加一个存储邮件的帐号和组(vmail)
执行如下命令
pw group add vmail -g 1000
pw user add vmail -u 1000 -g 1000 -s /sbin/nologin -d /dev/null

给test用户创建路径
需要一个测试帐号test@xxxxx.cn,需要准备该账号的路径。
mkdir -p /home/domains/xxxxx.cn/test/Maildir/new
mkdir -p /home/domains/xxxxx.cn/test/Maildir/cur
mkdir -p /home/domains/xxxxx.cn/test/Maildir/tmp
chown -R vmail:vmail /home/domains/
chmod -R 700 /home/domains/

ExtMan的安装
由于在安装过程中要使用ExtMan里面带的文件,因此在此先安装ExtMan。安装时根据个人需要选择MySQL或者mysql支持。

cd /usr/ports/mail/extman/ && make install clean
安装时选择mysql

安装mysql
cd /usr/ports/databases/mysql50-server/ && make WITH_CHARSET=gbk WITH_XCHARSET=all WITH_PROC_SCOPE_PTH=yes BUILD_OPTIMIZED=yes BUILD_STATIC=yes SKIP_DNS_CHECK=yes WITHOUT_INNODB=yes install clean

编辑/etc/rc.conf
ee /etc/rc.conf
mysql_enable=”YES”
复制 MySQL 配置文件
cp /usr/local/share/mysql/my-small.cnf /usr/local/etc/my.cnf

ee /usr/local/etc/my.cnf
在[mysqld]组中加入下面的内容,部分内容看来如下
[mysqld]
bind_address=127.0.0.1
将mysql端口绑定到127.0.0.1主要因为该服务器只为本站提供服务,为了增加安全性,所以这样做。

启动 mysql-server
/usr/local/bin/mysql_install_db –user=mysql
cp /usr/local/etc/rc.d/mysql-server /usr/local/etc/rc.d/mysql.sh
/usr/local/etc/rc.d/mysql-server start

修改root用户的密码
/usr/local/bin/mysqladmin -u root -p password
Enter password:

安装 openssl
cd /usr/ports/security/openssl/ && make install clean
安装配置文件
cp /usr/local/openssl/openssl.cnf.sample /usr/local/openssl/openssl.cnf

安装配置courier-imap POP3/IMAP
Courier-IMAP是一个提供POP3、IMAP服务的程序,能够很方便的配置使其支持加密协议POP3s、IMAPs。并良好的支持Maildir。
Courier-imap的安装
安装时选择(如果你使用MySQL认证,则选择AUTH_MYSQL):

OPENSSL
TRASHQUOTA
AUTH_MYSQL

cd /usr/ports/mail/courier-imap/ && make install clean
安装时选择 TRASHQUOTA AUTH_MYSQL

Authlib的配置
mv /usr/local/etc/authlib/authdaemonrc /usr/local/etc/authlib/authdaemonrc.bak
编辑/usr/local/etc/authlib/authdaemonrc文件,内容类似如下:

authmodulelist=”authmysql”
authmodulelistorig=”authmysql”
version=”authdaemond.mysql”
daemons=5
authdaemonvar=/var/run/authdaemond
subsystem=mail
DEBUG_LOGIN=0
DEFAULTOPTIONS=”wbnodsn=1″
LOGGEROPTS=””

增加/var/run/authdaemond的执行权限,在FreeBSD系统下,其他用户默认没有执行权限
chmod +x /var/run/authdaemond
mv /usr/local/etc/authlib/authmysqlrc /usr/local/etc/authlib/authmysqlrc.bak
编辑/usr/local/etc/authlib/authmysqlrc文件,内容类似如下:
MYSQL_SERVER localhost
MYSQL_USERNAME extmail
MYSQL_PASSWORD extmail
MYSQL_PORT 0
MYSQL_OPT 0
MYSQL_DATABASE extmail
MYSQL_SELECT_CLAUSE SELECT username,password,””,uidnumber,gidnumber,\
CONCAT(‘/home/domains/’,homedir), \
CONCAT(‘/home/domains/’,maildir), \
quota, \
name \
FROM mailbox \
WHERE username = ‘$(local_part)@$(domain)’

配置支持POP3s
拷贝一份配置文件
cp /usr/local/etc/courier-imap/pop3d.cnf.dist /usr/local/etc/courier-imap/pop3d.cnf

编辑/usr/local/etc/courier-imap/pop3d.cnf文件,类似如下:
RANDFILE = /usr/local/share/courier-imap/pop3d.rand

[ req ]
default_bits = 1024
encrypt_key = yes
distinguished_name = req_dn
x509_extensions = cert_type
prompt = no

[ req_dn ]
C=CN
ST=BJ
L=Bei Jing
O=Extmail
OU=Extmail
CN=xxxxx.cn
emailAddress=ppabc@qq.com

[ cert_type ]
nsCertType = server

执行如下命令产生供POP3s使用的证书
/usr/local/sbin/mkpop3dcert

配置支持IMAPs
拷贝一份配置文件

cp /usr/local/etc/courier-imap/imapd.cnf.dist /usr/local/etc/courier-imap/imapd.cnf
编辑/usr/local/etc/courier-imap/imapd.cnf文件,类似如下:

RANDFILE = /usr/local/share/courier-imap/imapd.rand

[ req ]
default_bits = 1024
encrypt_key = yes
distinguished_name = req_dn
x509_extensions = cert_type
prompt = no

[ req_dn ]
C=CN
ST=BJ
L=Bei Jing
O=Extmail
OU=Extmail
CN=xxxxx.cn
emailAddress=ppabc@qq.com

[ cert_type ]
nsCertType = server

执行如下命令产生供IMAP使用的证书
/usr/local/sbin/mkimapdcert

配置自动启动
编辑/etc/rc.conf文件,添加如下行:

courier_authdaemond_enable=”YES”
courier_imap_pop3d_enable=”YES”
courier_imap_imapd_enable=”YES”
courier_imap_pop3d_ssl_enable=”YES”
courier_imap_imapd_ssl_enable=”YES”

这5行的作用分别是在开机时:启动authdaemond,启动pop3d,启动imapd,启动pop3d-ssl,启动imapd-ssl。也可以使用命令行来控制这些进程的启动或者停止。
/usr/local/etc/rc.d/courier-authdaemond start/stop
/usr/local/etc/rc.d/courier-imap-pop3d start/stop
/usr/local/etc/rc.d/courier-imap-imapd start/stop
/usr/local/etc/rc.d/courier-imap-pop3d-ssl start/stop
/usr/local/etc/rc.d/courier-imap-imapd-ssl start/stop

Postfix的安装和配置-MTA
MTA在邮件系统中处于非常重要的位置,他负责接收其他人给你发的信,并且负责把你的信转发到目的地。选择一个靠谱的MTA对建立邮件来说意义重大,因此我们使用Postfix!! :-)。另外MTA部分在邮件系统中的开发难度是最高的,起到的作用也是最大的,因此我们也常拿MTA的名字来称呼自己的邮件系统,比如:我常说我的邮件系统是Postfix。

安装postfix
安装时选择(如果你使用MySQL验证,可以选择MYSQL):

PCRE
SASL2
TLS
MYSQL
VDA
TEST

cd /usr/ports/mail/postfix/ && make install clean
安装时选择PCRE SASL2 TLS MYSQL VDA TEST

配置postfix
编辑/etc/rc.conf,增加如下一行

postfix_enable=”YES”
编辑/etc/aliases,确保有如下一行
postfix: root
替换掉系统带的sendmail程序
mv /usr/sbin/sendmail /usr/sbin/sendmail.bak
cp /usr/local/sbin/sendmail /usr/sbin/sendmail

编辑/etc/periodic.conf,加入如下内容,禁掉sendmail的自动维护。
daily_clean_hoststat_enable=”NO”
daily_status_mail_rejects_enable=”NO”
daily_status_include_submit_mailq=”NO”
daily_submit_queuerun=”NO”

执行如下命令
/usr/local/sbin/postalias /etc/aliases
chown postfix:postfix /etc/opiekeys
/usr/local/sbin/postconf -e ‘mydomain = xxxxx.cn’
/usr/local/sbin/postconf -e ‘myhostname = mail.xxxxx.cn’
/usr/local/sbin/postconf -e ‘myorigin = $mydomain’
/usr/local/sbin/postconf -e ‘virtual_mailbox_base = /home/domains’
/usr/local/sbin/postconf -e ‘virtual_uid_maps=static:1000’
/usr/local/sbin/postconf -e ‘virtual_gid_maps=static:1000’

执行如下命令对查询表进行配置

cp /usr/local/www/extman/docs/mysql_virtual_* /usr/local/etc/postfix/
/usr/local/sbin/postconf -e ‘virtual_alias_maps = $alias_maps, mysql:/usr/local/etc/postfix/mysql_virtual_alias_maps.cf’
/usr/local/sbin/postconf -e ‘virtual_mailbox_maps = mysql:/usr/local/etc/postfix/mysql_virtual_mailbox_maps.cf’
/usr/local/sbin/postconf -e ‘virtual_mailbox_domains = mysql:/usr/local/etc/postfix/mysql_virtual_domains_maps.cf’

SMTP认证设置
编辑/usr/local/lib/sasl2/smtpd.conf

pwcheck_method:authdaemond
log_level:3
mech_list:PLAIN LOGIN
authdaemond_path:/var/run/authdaemond/socket

对postfix做如下配置使支持smtp认证
/usr/local/sbin/postconf -e ‘smtpd_sasl_auth_enable=yes’
/usr/local/sbin/postconf -e ‘broken_sasl_auth_clients = yes’
/usr/local/sbin/postconf -e ‘smtpd_sasl_local_domain = $myhostname’

postfix反垃圾设置
此处的反垃圾邮件只是在MTA级的一些预防垃圾邮件的设置,可根据实际情况以及自己的需要进行调整。

/usr/local/sbin/postconf -e ‘smtpd_helo_required=yes’
/usr/local/sbin/postconf -e ‘smtpd_delay_reject=yes’
/usr/local/sbin/postconf -e ‘disable_vrfy_command=yes’
/usr/local/sbin/postconf -e ‘smtpd_client_restrictions = check_client_access hash:/usr/local/etc/postfix/client_access’
/usr/local/sbin/postconf -e ‘smtpd_helo_restrictions=reject_invalid_hostname,check_helo_access hash:/usr/local/etc/postfix/helo_access’
/usr/local/sbin/postconf -e ‘smtpd_sender_restrictions = reject_non_fqdn_sender, reject_unknown_sender_domain, check_sender_access hash:/usr/local/etc/postfix/sender_access’
/usr/local/sbin/postconf -e ‘smtpd_recipient_restrictions=permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_non_fqdn_recipient, reject_unknown_recipient_domain’
/usr/local/sbin/postconf -e ‘smtpd_data_restrictions=reject_unauth_pipelining’
/usr/local/sbin/postconf -e ‘header_checks = regexp:/usr/local/etc/postfix/head_checks’
/usr/local/sbin/postconf -e ‘body_checks = regexp:/usr/local/etc/postfix/body_checks’
touch /usr/local/etc/postfix/head_checks
touch /usr/local/etc/postfix/body_checks
touch /usr/local/etc/postfix/client_access
touch /usr/local/etc/postfix/sender_access
touch /usr/local/etc/postfix/helo_access
/usr/local/sbin/postmap /usr/local/etc/postfix/head_checks
/usr/local/sbin/postmap /usr/local/etc/postfix/body_checks
/usr/local/sbin/postmap /usr/local/etc/postfix/client_access
/usr/local/sbin/postmap /usr/local/etc/postfix/sender_access
/usr/local/sbin/postmap /usr/local/etc/postfix/helo_access

TLS设置
生成证书,在这里默认私钥的访问密码为123qwe98,请根据自己的情况决定,以后可能会用得到。

mkdir -p /usr/local/etc/postfix/certs/CA
cd /usr/local/etc/postfix/certs/CA
mkdir certs crl newcerts private
echo “01” > serial
touch index.txt
cp /usr/local/openssl/openssl.cnf .

编辑openssl.cnf,确认dir参数的值是/usr/local/etc/postfix/certs/CA。然后继续执行如下命令,并根据情况输入信息。输入信息类似如下:
Country Name (2 letter code) [AU]:CN
State or Province Name (full name) [Some-State]:BJ
Locality Name (eg, city) []:Bei Jing
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Extmail
Organizational Unit Name (eg, section) []:extmail
Common Name (eg, YOUR name) []:xxxxx.cn
Email Address []:ppabc@qq.com

命令如下:
openssl req -new -x509 -keyout private/cakey.pem -out cacert.pem -days 3650 -config openssl.cnf
openssl req -nodes -new -x509 -keyout mykey.pem -out myreq.pem -days 3650 -config openssl.cnf
openssl x509 -x509toreq -in myreq.pem -signkey mykey.pem -out tmp.pem
openssl ca -config openssl.cnf -policy policy_anything -out mycert.pem -infiles tmp.pem
rm tmp.pem
cp cacert.pem /usr/local/etc/postfix/certs/
cp mycert.pem /usr/local/etc/postfix/certs/
cp mykey.pem /usr/local/etc/postfix/certs/
cd /usr/local/etc/postfix/certs/
chown root:wheel cacert.pem mycert.pem
chown root:postfix mykey.pem
chmod 755 cacert.pem
chmod 644 mycert.pem
chmod 440 mykey.pem
ln -s cacert.pem `openssl x509 -noout -hash < cacert.pem `.0 配置postfix支持TLS /usr/local/sbin/postconf -e 'smtpd_use_tls=yes' /usr/local/sbin/postconf -e 'smtpd_tls_auth_only=no' /usr/local/sbin/postconf -e 'smtp_tls_CAfile = /usr/local/etc/postfix/certs/cacert.pem' /usr/local/sbin/postconf -e 'smtp_tls_cert_file = /usr/local/etc/postfix/certs/mycert.pem' /usr/local/sbin/postconf -e 'smtp_tls_key_file = /usr/local/etc/postfix/certs/mykey.pem' /usr/local/sbin/postconf -e 'smtpd_tls_CAfile=/usr/local/etc/postfix/certs/cacert.pem' /usr/local/sbin/postconf -e 'smtpd_tls_cert_file=/usr/local/etc/postfix/certs/mycert.pem' /usr/local/sbin/postconf -e 'smtpd_tls_key_file=/usr/local/etc/postfix/certs/mykey.pem' /usr/local/sbin/postconf -e 'smtpd_tls_received_header=yes' /usr/local/sbin/postconf -e 'smtpd_tls_loglevel=3' /usr/local/sbin/postconf -e 'smtpd_starttls_timeout=60s' /usr/local/etc/postfix/master.cf 配置master.cf,添加如下信息 smtps inet n - n - - smtpd -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject Maildrop的安装和配置-MDA MDA-邮件分发代理。他从MTA那儿拿到信,然后存入您的邮箱里面。MDA在投递邮件到您的目录里面时,会先对邮件进行一些过滤,过滤规则会根据您的配置文件来进行。1,进行全局过滤设置,读取/etc/maildroprc(Linux)或者/usr/local/etc/maildroprc(BSD),根据配置该配置文件执行相应的操作,影响到所有用户;2,根据每个用户的配置进行过滤,读取$HOME/.mailfilter,根据每个用户的设置进行相应的操作,仅影响单个用户。基于这样的特点,WEBMAIL通过编辑$HOME/.mailfilter可以实现一些特色化的东西,比如:黑白名单、SPAM自动转入垃圾邮件夹、SMS提醒等等。 安装maildrop cd /usr/ports/mail/maildrop/ && make WITH_AUTHLIB=yes install clean 安装时选择mysql 修改master.cf 修改master.cf的maildrop,类似修改为: #maildrop unix - n n - - pipe # flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient} maildrop unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/local/bin/maildrop -w 90 -d ${recipient} /usr/local/etc/postfix/main.cf 修改main.cf /usr/local/sbin/postconf -e 'virtual_transport=maildrop:' /usr/local/sbin/postconf -e 'maildrop_destination_concurrency_limit=1' /usr/local/sbin/postconf -e 'maildrop_destination_recipient_limit=1' 编辑文件/usr/local/etc/maildroprc 确保是如下内容: logfile "/home/domains/maildrop.log" #logfile "/var/log/maildrop.log" TEST="/bin/test -f" # # Check for custom user .mailfilter file # CUSTOM_FILTER="$HOME/.mailfilter" `$TEST $CUSTOM_FILTER && exit 1 || exit 0` if ( $RETURNCODE == 0 ) { to "$HOME/Maildir" } 安装配置Apache 安装apache 添加了这两个参数的意思是,支持suexec模块,改变suexec_docroot的路径。但在本文中并没有在虚拟主机中使用suexec,在此编译进去是为了方便测试,以及方便以后可能会使用到的朋友。其他选项使用默认的即可。 cd /usr/ports/www/apache22/ && make WITH_SUEXEC=yes SUEXEC_DOCROOT=/usr/local/www WITH_MPM=worker WITHOUT_IPV6=yes WITH_THREADS=yes install clean 使用默认的即可 配置/etc/rc.conf 添加如下一行 apache22_enable="YES" 修改apache的配置文件/usr/local/etc/apache22/httpd.conf,使apache运行时的权限为vmail:vmail User vmail Group vmail 虚拟主机配置 编辑/usr/local/etc/apache22/Includes/extmail.conf NameVirtualHost *:80
ServerName mail.xxxxx.cn
DocumentRoot /usr/local/www/extmail/html/

ScriptAlias /extmail/cgi /usr/local/www/extmail/cgi/
Alias /extmail /usr/local/www/extmail/html/
ScriptAlias /extman/cgi “/usr/local/www/extman/cgi/”
Alias /extman “/usr/local/www/extman/html/”


SetHandler cgi-script
Options +ExecCGI
AllowOverride All


AllowOverride None
Options None
Order allow,deny
Allow from all

# SuexecUserGroup vmail vmail

配置支持https
复制一份证书到apache的目录
mkdir /usr/local/etc/apache22/certs/
cp /usr/local/etc/postfix/certs/*.pem /usr/local/etc/apache22/certs/

编辑文件/usr/local/etc/apache22/Includes/extmail-ssl.conf,内容如下
Listen 443

AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crl

SSLPassPhraseDialog builtin
SSLSessionCache shmcb:/var/run/ssl_scache(512000)
SSLSessionCacheTimeout 300
SSLMutex file:/var/run/ssl_mutex

DocumentRoot “/usr/local/www/extmail/html”
ServerName mail.xxxxx.cn:443

ScriptAlias /extmail/cgi /usr/local/www/extmail/cgi/
Alias /extmail /usr/local/www/extmail/html/
ScriptAlias /extman/cgi “/usr/local/www/extman/cgi/”
Alias /extman “/usr/local/www/extman/html/”

ServerAdmin ppabc@qq.com
ErrorLog /var/log/httpd-error.log
TransferLog /var/log/httpd-access.log
SSLEngine on
SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL
#SSLCertificateFile /usr/local/etc/apache22/server.crt
#SSLCertificateKeyFile /usr/local/etc/apache22/server.key

SSLCertificateFile /usr/local/etc/apache22/certs/mycert.pem
SSLCertificateKeyFile /usr/local/etc/apache22/certs/mykey.pem


SSLOptions +StdEnvVars


SSLOptions +StdEnvVars

BrowserMatch “.*MSIE.*” \
nokeepalive ssl-unclean-shutdown \
downgrade-1.0 force-response-1.0
CustomLog /var/log/httpd-ssl_request.log \
“%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \”%r\” %b”

#SuexecUserGroup vmail vmail

重起一下apache
/usr/local/etc/rc.d/apache22.sh restart
安装配置Extmail
Extmail 是一个以perl语言编写,面向大容量/ISP级应用,免费的高性能Webmail软件。完整的支持Maildir++, 多字符、多语言支持,支持模版技术、方便的为自己定制界面等等。

安装extmail
安装不需要选择MySQL,mysql,因为在安装ExtMan的时候已经把这些包装上了。
cd /usr/ports/mail/extmail && make install clean
安装不需要选择MySQL

复制一份配置文件
cp /usr/local/www/extmail/webmail.cf.default /usr/local/www/extmail/webmail.cf
编辑/usr/local/www/extmail/webmail.cf,修改对应的参数如下
SYS_CONFIG = /usr/local/www/extmail/
SYS_LANGDIR = /usr/local/www/extmail/lang
SYS_TEMPLDIR = /usr/local/www/extmail/html
SYS_SESS_DIR = /var/tmp/extmail/
SYS_LOG_TYPE = file
SYS_USER_LANG = zh_CN
SYS_USER_CHARSET = utf-8
SYS_AUTH_TYPE = mysql
SYS_MAILDIR_BASE = /home/domains
SYS_mysql_BASE = dc=xxxxx.cn
SYS_mysql_RDN = cn=Manager,dc=xxxxx.cn
SYS_mysql_PASS = secret
SYS_mysql_HOST = mysql.xxxxx.cn
SYS_mysql_ATTR_USERNAME = mail
SYS_mysql_ATTR_DOMAIN = virtualDomain
SYS_mysql_ATTR_PASSWD = userPassword
SYS_mysql_ATTR_QUOTA = mailQuota
SYS_mysql_ATTR_NDQUOTA = netdiskQuota
SYS_mysql_ATTR_HOME = homeDirectory
SYS_mysql_ATTR_MAILDIR = mailMessageStore

执行如下命令
mkdir /var/tmp/extmail
chown vmail:vmail /var/tmp/extmail/
chmod 777 /var/tmp/extmail
touch /var/log/extmail.log
chown vmail:vmail /var/log/extmail.log
chown -R vmail:vmail /usr/local/www/extmail/

配置ExtMan
ExtMan是一个基于Web的邮件帐号管理系统。可以通过他来管理邮件帐号、管理员帐号和域名等,默认的超级用户是 root@xxxxx.cn,密码是extmail*123* ExtMan还集成了mailgraph,可以ExtMan内看到整个邮件系统的相关状态流量图。使用ExtMan来管理您的邮件系统将使工作变得更加轻松。之前我们已经安装了ExtMan,在此直接配置webman.cf即可。

配置extman
编辑/usr/local/www/extman/webman.cf,修改对应的参数如下
SYS_CONFIG = /usr/local/www/extman/
SYS_LANGDIR = /usr/local/www/extman/lang
SYS_TEMPLDIR = /usr/local/www/extman/html
SYS_MAILDIR_BASE = /home/domains
SYS_SESS_DIR = /var/tmp/extman/
SYS_PSIZE = 50
SYS_LANG = zh_CN
SYS_DEFAULT_MAXQUOTA = 10000
SYS_DEFAULT_MAXALIAS = 10000
SYS_DEFAULT_MAXUSERS = 1000
SYS_DEFAULT_MAXNDQUOTA = 100
SYS_BACKEND_TYPE = mysql
SYS_mysql_BASE = dc=xxxxx.cn
SYS_mysql_RDN = cn=Manager,dc=xxxxx.cn
SYS_mysql_PASS = secret
SYS_mysql_HOST = localhost
SYS_mysql_ATTR_USERNAME = mail
SYS_mysql_ATTR_PASSWD = userPassword

其他设置
执行如下命令
mkdir /var/lib
mkdir /var/tmp/extman/
chown –R vmail:vmail /var/tmp/extman/
chmod 777 /var/tmp/extman/
chmod 755 /usr/local/www/extman/webman.cf
unlink /usr/local/www/extman/libs/HTML/KTemplate.pm
cp /usr/local/www/extmail/libs/HTML/KTemplate.pm /usr/local/www/extman/libs/HTML/

配置图形日志
安装依赖软件
cd /usr/ports/databases/rrdtool && make install clean
cd /usr/ports/devel/p5-File-Tail && make install clean
cd /usr/ports/devel/p5-Time-HiRes && make install clean

安装mailgraph_ext
cp -Rfp /usr/local/www/extman/addon/mailgraph_ext/ /usr/local/mailgraph_ext
/usr/local/mailgraph_ext/mailgraph-init start
/usr/local/mailgraph_ext/qmonitor-init start

测试基本系统
到目前为止,一个基本的邮件系统已经安装完成,他支持了smtp,pop3,imap,webmail。并且支持对应的SSL加密smtps,pop3s,imaps,https。

测试pop3
telnet localhost 110
Trying 127.0.0.1…
Connected to localhost.localdomain (127.0.0.1).
Escape character is ‘^]’.
+OK Hello there.
user test@xxxxx.cn
+OK Password required.
pass test
+OK logged in.
list
+OK POP3 clients that break here, they violate STD53.
.
quit
+OK Bye-bye.
Connection closed by foreign host.

测试smtp认证
通过以下命令获得test@xxxxx.cn的用户名及密码的BASE64编码:

perl -e ‘use MIME::Base64; print encode_base64(“test\@xxxxx.cn”)’
dGVzdEBleHRtYWlsLm9yZw==
perl -e ‘use MIME::Base64; print encode_base64(“test”)’
dGVzdA==

然后本机测试,其过程如下
telnet localhost 25
Trying 127.0.0.1…
Connected to localhost.localdomain (127.0.0.1).
Escape character is ‘^]’.
220 mail.xxxxx.cn ESMTP Postfix – by xxxxx.cn
ehlo demo.domain.tld
250-mail.xxxxx.cn
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
auth login
334 VXNlcm5hbWU6
dGVzdEBleHRtYWlsLm9yZw==
334 UGFzc3dvcmQ6
dGVzdA==
235 2.0.0 Authentication successful
quit
221 2.0.0 Bye

最后出现235 Authentication Successful 表明认证成功了。

测试smtps
mail# telnet localhost 25
Trying ::1…
Trying 127.0.0.1…
Connected to localhost.localhostadmin.
Escape character is ‘^]’.
220 mail.xxxxx.cn ESMTP Postfix
ehlo localhost
250-mail.xxxxx.cn
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
STARTTLS
220 2.0.0 Ready to start TLS
^]
telnet> q
Connection closed.

测试pop3s/imaps
telnet连接本机的993,995端口出现如下提示:

telnet localhost 993
Trying ::1…
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1…
Connected to localhost.localhostadmin.
Escape character is ‘^]’.
^]
telnet> q
Connection closed.

telnet localhost 995
Trying ::1…
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1…
Connected to localhost.localhostadmin.
Escape character is ‘^]’.
^]
telnet> q
Connection closed.

也可以在OutLook中如下设置进行测试

测试webmail/extman
你能通过如下链接登陆webmail
http://mail.xxxxx.cn
https://mail.xxxxx.cn

http://mail.xxxxx.cn/extman
https://mail.xxxxx.cn/extman

内容/病毒过虑

安装amavisd-new
amavisd-new是一个类似Mailscanner的解信的程序,他可以调用外部的杀毒/反垃圾来对邮件进行过滤,很方便的实现病毒过滤,内容过滤。amavisd和mailscanner的不同在于,他使用SMTP协议通信,处理完后再回传给Postfix,整个过程不会对Postfix造成任何结构上的影响。Mailscanner必须监视Postfix的Hold队列,采用比较暴力的做法。

cd /usr/ports/security/amavisd-new && make install clean
安装时选择 BDB MILTER SPAMASSASSIN FILE RAR UNRAR ARJ LHA ARC CAB RPM ZOO UNZOO LZOP FREEZE P7ZIP

修改/etc/rc.conf增加如下一行,系统启动时自动运行amavisd
amavisd_enable=”YES”

配置amavisd.conf
修改/usr/local/etc/amavisd.conf文件中对应的选项,如下
$max_servers = 10;
$sa_spam_subject_tag = ‘[SPAM] ‘;
$mydomain = ‘mail.xxxxx.cn’;
$myhostname = ‘mail.xxxxx.cn’;
@local_domains_maps = qw(.);
$sa_tag_level_deflt = undef;
$sa_tag2_level_deflt = 5.0;
$sa_kill_level_deflt = 5.0;
$final_virus_destiny = D_DISCARD;
$final_banned_destiny = D_DISCARD;
$final_spam_destiny = D_DISCARD;
$virus_admin = “postmaster\@$mydomain”;
$mailfrom_notify_admin = “postmaster\@$mydomain”;
$mailfrom_notify_recip = “postmaster\@$mydomain”;
$mailfrom_notify_spamadmin = “postmaster\@$mydomain”;
@whitelist_sender_maps = read_hash(“$MYHOME/white.lst”);
@blacklist_sender_maps = read_hash(“$MYHOME/black.lst”);
$spam_quarantine_to = “spam\@$mydomain”;
$virus_quarantine_to = “virus\@$mydomain”;
$banned_quarantine_to = “spam\@$mydomain”;
$hdrfrom_notify_admin = “Content Filter “;

执行如下操作
touch /var/amavis/white.txt
touch /var/amavis/black.txt
chown –R vscan:vscan /var/amavis/

配置postfix对amavisd-new的支持
修改/usr/local/etc/postfix/master.cf,增加如下内容
smtp-amavis unix – – n – 4 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes

127.0.0.1:10025 inet n – n – – smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o strict_rfc821_envelopes=yes
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o receive_override_options=

修改content_filter ,receive_override_options这两项,禁止地址展开/影射,否则遇到别名时会产生冗余邮件。但是打开这一项receive_override_options后会和邮件列表程序相冲突,导致邮件列表的aliases不能打开。:(所以如果使用了邮件列表,则不要设置receive_override_options这一项。
/usr/local/sbin/postconf -e ‘content_filter = smtp-amavis:[localhost]:10024’
/usr/local/sbin/postconf -e ‘receive_override_options = no_address_mappings’

配置clamav
Clamav是一个比较好的杀毒程序,他被amavisd调用,可以查杀所有常见的病毒,在邮件系统中我们用它来对邮件进行查毒,

cd /usr/ports/security/clamav && make install clean
安装时选择 ARC ARJ LHA UNZOO UNRAR

修改配置文件
编辑/usr/local/etc/clamd.conf
User vscan
编辑/usr/local/etc/freshclam.conf
DatabaseOwner vscan
修改/etc/rc.conf增加两行
clamav_clamd_enable=”YES”
clamav_freshclam_enable=”YES”

修改/usr/local/etc/amavisd.conf,增加如下内容,使amavis-new对clamav的支持
[‘ClamAV-clamd’,
\&ask_daemon, [“CONTSCAN {}\n”, “/var/run/clamav/clamd”],
qr/\bOK$/, qr/\bFOUND$/,
qr/^.*?: (?!Infected Archive)(.*) FOUND$/ ],

修改权限设置
chown -R vscan:vscan /var/run/clamav/
chown -R vscan:vscan /var/log/clamav/
chown -R vscan:vscan /var/db/clamav/

启动clamav。clamav有2个daemon需要启动,一个是用来查病毒的clamd,另外一个是用来更新病毒库的freshclam,他们分别通过如下脚本启动。
/usr/local/etc/rc.d/clamav-clamd start
/usr/local/etc/rc.d/clamav-freshclam start

配置Spamassassin
开源软件中最好的内容过滤程序,做内容过滤的必选。

配置

cp /usr/local/etc/mail/spamassassin/local.cf.sample /usr/local/etc/mail/spamassassin/local.cf
修改/usr/local/etc/mail/spamassassin/local.cf
report_safe 1
use_bayes 0
auto_learn 0
bayes_auto_expire 1
skip_rbl_checks 1
use_razor2 0
use_dcc 0
use_pyzor 0
dns_available no
lock_method flock

使用Chinese_rules.cf
fetch得到这个规则后可以看到,他从2006年10月2日以来,都没有再更新过了,因此是否仍然使用该规则取决于您自己。如果仍然想继续使用,按照如下的操作即可。
-rw-r–r– 1 root wheel 55342 Oct 2 2006 Chinese_rules.cf
编辑脚本/var/cron/sa.sh
#!/bin/sh
cd /tmp/
fetch -q http://www.ccert.edu.cn/spam/sa/Chinese_rules.cf
mv Chinese_rules.cf /usr/local/share/spamassassin/
/usr/local/etc/rc.d/amavisd forcerestart > /dev/null

增加执行权限
chmod +x /var/cron/sa.sh
编辑/etc/crontab,增加一行如下,每周6执行一次
0 0 * * 6 root /var/cron/sa.sh

测试杀毒/内容过滤
测试杀毒。在做该测试之前,你需要确保你的clamd,amavisd,postfix都正常启动。可以通过如下脚本来启动他们。
/usr/local/etc/rc.d/clamav-clamd restart
/usr/local/etc/rc.d/amavisd restart
/usr/local/etc/rc.d/postfix restart

telnet localhost 25
Trying 127.0.0.1…
Connected to localhost.localdomain (127.0.0.1).
Escape character is ‘^]’.
220 mail.xxxxx.cn ESMTP Postfix – by xxxxx.cn
helo localhost
250 mail.xxxxx.cn
mail from: 250 2.1.0 Ok
rcpt to:
250 2.1.5 Ok
data
354 End data with .
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
.
250 2.0.0 Ok: queued as BC24E85260
quit
221 2.0.0 Bye
Connection closed by foreign host.

maillog中出现类似如下日志则说明clamav和amavid-new正常工作
Aug 3 15:42:41 mail amavis[730]: (00730-01) Blocked INFECTED (Eicar-Test-Signature), LOCAL [127.0.0.1] [127.0.0.1] -> , quarantine: virus-4JnxM33M2NNc, Message-ID: <20060803074227.7F9581701D@mail.xxxxx.cn>, mail_id: 4JnxM33M2NNc, Hits: -, 212 ms

安装邮件列表软件mailman
Mailman是一个比较好的邮件列表程序,功能非常强大,提供完美的Web端,权限可以分散管理,多个开源组织都在使用。

安装mailman
cd /usr/ports/mail/mailman && make MAIL_GID=mailman CGI_GID=vmail install clean
安装时选择: POSTFIX CHINESE

在此使用mailman做为MAIL_GID是为了避免在后期的维护中使用check_perms -f修复权限的时候,mailman会自动默认修改为mailman这个用户来转发邮件。而使用 CGI_GID=vmail作为mailman的CGI执行权限是为了跟extmail/extman执行cgi时的权限一致。

配置/etc/rc.conf
增加一行
mailman_enable=”YES”
配置postfix支持
touch /usr/local/mailman/data/aliases
touch /usr/local/mailman/data/virtual-mailman
/usr/local/sbin/postconf -e ‘recipient_delimiter=+’
/usr/local/sbin/postconf -e ‘alias_maps=hash:/etc/aliases, hash:/usr/local/mailman/data/aliases’
postalias /usr/local/mailman/data/aliases
/usr/local/sbin/postconf -e ‘virtual_alias_maps = mysql:/usr/local/etc/postfix/mysql_virtual_alias_maps.cf, hash:/usr/local/mailman/data/virtual-mailman’
postalias /usr/local/mailman/data/aliases
postmap /usr/local/mailman/data/virtual-mailman
/usr/local/sbin/postconf -e ‘default_privs = mailman’
postfix reload

配置mailman
cd /usr/local/mailman
/usr/local/mailman/bin/genaliases
chown -R vmail:mailman /usr/local/mailman/data/aliases*
chown -R vmail:mailman /usr/local/mailman/data/virtual-mailman*
chmod 664 /usr/local/mailman/data/aliases*
chmod 664 /usr/local/mailman/data/virtual-mailman*
cp -Rfp icons/ cgi-bin/icons
cp /usr/local/www/icons/powerlogo.gif cgi-bin/icons/

修改管理员密码,在这里我默认为123qwe98
bin/mmsitepass
编辑/usr/local/mailman/Mailman/mm_cfg.py,增加如下内容
MTA = ‘Postfix’
POSTFIX_STYLE_VIRTUAL_DOMAINS = [‘lists.xxxxx.cn’]
add_virtualhost(‘lists.xxxxx.cn’,’lists.xxxxx.cn’)

DEFAULT_EMAIL_HOST = ‘lists.xxxxx.cn’
DEFAULT_URL_HOST = ‘lists.xxxxx.cn’
DEFAULT_SERVER_LANGUAGE = ‘zh_CN’

创建一个邮件列表mailman
mailman列表为必须创建的,管理员邮箱使用root@xxxxx.cn,密码使用12345678
bin/newlist mailman
配置apache支持mailman
在文件/usr/local/etc/apache22/Includes/extmail.conf中添加如下内容。


ServerName lists.xxxxx.cn
DocumentRoot /usr/local/mailman/cgi-bin/
ScriptAlias /mailman “/usr/local/mailman/cgi-bin/”
Alias /pipermail /usr/local/mailman/archives/public/

AddDefaultCharset Off


Options FollowSymLinks ExecCGI
AllowOverride None
Order allow,deny
Allow from all

重启APACHE
/usr/local/sbin/apachectl restart

解压extman
tar xzf extman-0.24.tar.gz
进入 docs 目录,导入 msyql 数据
cd /usr/local/www/extman/docs
cd extman-0.2.4/docs/
/usr/local/bin/mysql -uroot -p

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