基于Centos6.2X64系统下的邮件系统2012年6月4日

1、/2010/11/postfx-postfixadmin-dovecot-roundcube-centos/http:/postfix.wiki.xs4all.nl/index.php?title=Virtual_Users_and_Domains_with_Courier-IMAP_and_MySQLPostfix mysql postfixadmin dovecot roundcube centos 5.7 (updated)基于Centos6.2 X64系统下的邮件系统原创作品，允许转载，转载时请务必以超链接形式标明文章 HYPERLINK http:/ t _blank 原始出处 、作

2、者信息和本声明。否则将追究法律责任。 HYPERLINK http:/ http:/ 所使用到的软件：Postfix+Dovecot+Mysql+PostfixAdmin+RoundcubemailAmavisd-new+ClamAV+SpamAssassin1、准备工作在安装前请把防火墙和selinux关闭，以防出错在163开源镜像站把CentOS的YUM软件仓库配置下载到本地 HYPERLINK http:/mirro/.help/CentOS6-Base-163.repo http:/mirro/.help/CentOS6-Base-163.repo添加rpmforge软件仓库 HYPE

3、RLINK http:/pkgs.repof/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm http:/pkgs.repof/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpmrootmail # cd /etc/yum.repos.d/rootmail yum.repos.d# mkdir bakrootmail yum.repos.d# mv CentOS* bakrootmail etc# cdrootmail # cp -var CentOS6-

4、Base-163.repo /etc/yum.repos.d/rootmail # rpm -ivh rpmforge-release-0.5.2-2.el6.rf.x86_64.rpmrootmail # ll /etc/yum.repos.d/total 24drwxr-xr-x. 2 root root 4096 Apr 25 03:21 bak-rw-r-r-. 1 root root 2006 Apr 16 19:52 CentOS6-Base-163.repo-rw-r-r-. 1 root root739 Nov 132010 mirrors-rpmforge-rw-r-r-.

5、1 root root717 Nov 132010 mirrors-rpmforge-extras-rw-r-r-. 1 root root728 Nov 132010 mirrors-rpmforge-testing-rw-r-r-. 1 root root 1113 Nov 132010 rpmforge.reporootmail # yum clean allrootmail # yum updatePostfix用6.2系统自带的，因为CentOS6里面的postfix包已经支持mysql创建一个vmail用户，用作管理虚拟邮箱的文件夹useradd -u 2000 -d /var/v

6、mail -m -s /sbin/nologin vmail安装dovecot软件rootmail # yum install dovecot dovecot-devel dovecot-mysql yDovecot设置为开机启动rootmail # chkconfig dovecot on2、安装Mysql+Httpd+Postfixadmin rootmail # yum install mysql mysql-server mysql-devel httpd php y启动mysql与httpdrootmail # /etc/init.d/mysqld startrootmail # /

7、etc/init.d/httpd start设置为开机启动rootmail # chkconfig mysqld onrootmail # chkconfig httpd on3、配置PostfixAdmin HYPERLINK http:/sourceforg/projects/postfixadmin/ http:/sourceforg/projects/postfixadmin/在上面的网址下载最新的PostfixAdmin软件包，我的版本是postfixadmin-2.3.5把安装包移动到/var/www/html目录下rootmail # tar xvf postfixadmin-2

8、.3.5.tar.gzrootmail # mv postfixadmin-2.3.5 /var/www/html/postfixadmin为PostfixAdmin创建Mysql数据库与权限rootmail # mysqlmysql create database mail;mysql GRANT ALL PRIVILEGES ON mail.* TO adminlocalhost IDENTIFIED BY 123123 WITH GRANT OPTION;修改PostfixAdmin的配置文件rootmail # vim /var/www/html/postfixadmin/config

9、.inc.php$CONFconfigured = true;$CONFdatabase_type = mysql;$CONFdatabase_host = localhost;$CONFdatabase_user = admin;$CONFdatabase_password = 123123;$CONFdatabase_name = mail;$CONFadmin_email = postmasterexamp;$CONFencrypt = dovecot:CRAM-MD5;$CONFdovecotpw = /usr/bin/doveadm pw;$CONFdomain_path = YES

10、;$CONFdomain_in_mailbox = NO;$CONFaliases = 1000;$CONFmailboxes = 1000;$CONFmaxquota = 1000;$CONFfetchmail = NO;$CONFquota = YES;$CONFused_quotas = YES;$CONFnew_quota_table = YES;配置完毕后在浏览器上运行 HYPERLINK http:/mail.examp/postfixadmin/setup.php http:/mail.examp/postfixadmin/setup.php上图错误为缺少php-mysql包，安

11、装后重启httpd服务即可rootmail # yum install php-mysql yrootmail # /etc/init.d/httpd restart安装上图缺少的php扩展包，重启httpd服务rootmail # yum install php-mbstring php-imap yrootmail # /etc/init.d/httpd restart设置setup password把生成的hash值复制到$CONFsetup_password = changemepostfxiadmin不能自动创建目录，增加自动建立目录的功能建立创建虚拟邮箱脚本，脚本名称 /usr/l

12、ocal/bin/maildir-creation.sh ，脚本内容如下：#!/bin/bashHOME_DIR=/var/vmailUSER_NAME=vmailGROUP_NAME=vmailif ! -d $HOME_DIR/$1 ; then mkdir $HOME_DIR/$1 chown -R $USER_NAME.$GROUP_NAME $HOME_DIR/$1fimkdir $HOME_DIR/$1/$2chown -R $USER_NAME.$GROUP_NAME $HOME_DIR/$1/$2建立删除虚拟邮箱脚本，脚本名称 /usr/local/bin/maildir-de

13、letion.sh ,脚本内容如下：#!/bin/bash# vmta ALL = NOPASSWD: /usr/local/bin/maildir-deletion.sh#if $# -ne 2 ; then exit 127fiDOMAIN=$1USER=$2HOME_DIR=/var/vmailUSER_DIR=$HOME_DIR/$DOMAIN/$USERTRASH_DIR=$HOME_DIR/deleted-maildirsDATE=date +%Y%m%d_%H%M%Sif ! -d $TRASH_DIR/$DOMAIN ; then mkdir -p $TRASH_DIR/$DO

14、MAINfiif -d $USER_DIR ; then mv $USER_DIR $TRASH_DIR/$DOMAIN/$USER-$DATEfi建立删除目录rootmail html# mkdir /var/vmail/deleted-maildirsrootmail html# chown -R vmail.vmail /var/vmail/deleted-maildirs/赋予脚本可执行权限rootmail html# chmod 750 /usr/local/bin/maildir-*rootmail html# chown vmail.vmail /usr/local/bin/ma

15、ildir-*配置sudo在 /etc/sudoers 增加一行vmail ALL = NOPASSWD: /usr/local/bin/maildir-creation.sh vmail ALL = NOPASSWD: /usr/local/bin/maildir-deletion.sh在/etc/sudoers 注释掉下面内容#Defaults requiretty修改postfixadmin的相关文件修改create-mailbox.php 文件，229行内容应该是：db_log ($SESSID_USERNAME, $fDomain, create_mailbox, $fUsernam

16、e);在该行前面增加下面一行：system(sudo /usr/local/bin/maildir-creation.sh $fDomain .$_POSTfUsername);修改delete.php 文件，146行内容应该是：db_log ($SESSID_USERNAME, $fDomain, delete_mailbox, $fDelete);在该行下面增加下面4行：$userarray=explode(,$fDelete);$user=$userarray0;$domain=$userarray1;system(sudo /usr/local/bin/maildir-deletion

17、.sh $domain $user);4、配置Postfix修改/etc/postfix/main.cf文件：基本配置myhostname = mail.exampmydomain = exampmyorigin = $mydomaininet_interfaces = allmydestination = localhostmynetworks_style = host虚拟域名配置# ADDRESS REDIRECTION (VIRTUAL DOMAIN)# The VIRTUAL_README document gives information about the many forms#

18、 of domain hosting that Postfix supports.# See: HYPERLINK http:/ http:/ The follwing lines connect Postfix with the MySQL database that contains information about# the virtual users/accounts hosted. See proxymap(8) virtual(5) and mysql_table(5)#virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysq

19、l_virtual_domains_maps.cf#virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf#virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf# Additional for quota supportvirtual_create_maildirsize = yesvirtual_mailbox_extended = yesvirtual_mailbox_limit_maps = my

20、sql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cfvirtual_mailbox_limit_override = yesvirtual_maildir_limit_message = Sorry, this user has exceeded their disk space quota, please try again later.virtual_overquota_bounce = yes#Specify the user/group that owns the mail folders. Im not sure if this i

21、s strictly necessary when using Dovecots LDA.virtual_uid_maps = static:2000virtual_gid_maps = static:2000#Specifies which tables proxymap can read: HYPERLINK http:/www.postf/postconf.5.html l proxy_read_maps http:/www.postf/postconf.5.html#proxy_read_mapsproxy_read_maps = $local_recipient_maps $myde

22、stination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps创建Mysql脚本rootmail # vim /et

23、c/postfix/mysql_virtual_domains_maps.cfuser = adminpassword = 123123hosts = localhostdbname = mailquery = SELECT domain FROM domain WHERE domain=%s AND active = 1#optional query to use when relaying for backup MX#query = SELECT domain FROM domain WHERE domain=%s AND backupmx = 0 AND active = 1rootma

24、il # vim /etc/postfix/mysql_virtual_alias_maps.cfuser = adminpassword = 123123hosts = localhostdbname = mailquery = SELECT goto FROM alias WHERE address=%s AND active = 1rootmail # vim /etc/postfix/mysql_virtual_mailbox_maps.cfuser = adminpassword = 123123hosts = localhostdbname = mailquery = SELECT

25、 CONCAT(domain,/,maildir) FROM mailbox WHERE username=%s AND active = 1rootmail # vim /etc/postfix/mysql_virtual_mailbox_limit_maps.cfuser = adminpassword = 123123hosts = localhostdbname = mailquery = SELECT quota FROM mailbox WHERE username=%s AND active = 1SMTP加密设定#SASL SUPPORT FOR CLIENTS# The fo

26、llowing options set parameters needed by Postfix to enable# SMTP AUTH support using Dovecots SASL component for authentication of mail clients.# See: /usr/share/doc/postfix-2.3.3/README_FILES/SASL_README - HYPERLINK http:/www.postf/SASL_README.html http:/www.postf/SASL_README.html# And /usr/share/do

27、c/dovecot-1.0.7/wiki/HowTo.PostfixAndDovecotSASL.txt - HYPERLINK http:/wiki.dovec/HowTo/PostfixAndDovecotSASL http:/wiki.dovec/HowTo/PostfixAndDovecotSASL# Turns on sasl authorizationsmtpd_sasl_auth_enable = yes#Use dovecot for authenticationsmtpd_sasl_type = dovecot# Path to UNIX socket for SASLsmt

28、pd_sasl_path = /var/run/dovecot/auth-client#Disable anonymous login. We dont want to run an open relay for spammers.smtpd_sasl_security_options = noanonymous#Adds support for email software that doesnt follow RFC 4954.#This includes most versions of Microsoft Outlook before 2007.broken_sasl_auth_cli

29、ents = yes#smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination使用Dovecot做为投递# TRANSPORT MAP#virtual_transport = dovecotdovecot_destination_recipient_limit = 1修改master.cf文件rootmail # vim /etc/postfix/master.cfdovecot unix - n n - - pipe flags=DRhu use

30、r=vmail:vmail argv=/usr/libexec/dovecot/dovecot-lda -f $sender -d $recipient(错误：Jun 4 11:48:50 yxxsweb postfix/postfix-script4371: starting the Postfix mail systemJun 4 11:48:50 yxxsweb postfix/master4372: fatal: /etc/postfix/master.cf: line 107: bad transport type: user=vmail:vmail没明白这个配置)注意: flags

31、前面有两个空格，否则会报上面的错误。5、配置Dovecot因为配置文件比较分散，我把需要修改的配置文件的内容列出来rootmail # vim /etc/dovecot/dovecot.confprotocols = imap pop3listen = *dict quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext!include conf.d/*.confrootmail # vim /etc/dovecot/conf.d/10-auth.confdisable_plaintext_auth = noauth_mechanisms = p

32、lain login cram-md5!include auth-sql.conf.extrootmail # vim /etc/dovecot/conf.d/10-mail.confmail_location = maildir:%hMaildirmbox_write_locks = fcntlrootmail # vim /etc/dovecot/conf.d/10-master.confservice imap-login inet_listener imap inet_listener imaps service pop3-login inet_listener pop3 inet_l

33、istener pop3s service lmtp unix_listener lmtp service imap service pop3 service auth unix_listener auth-userdb mode = 0600 user = vmail group = vmail unix_listener auth-client mode = 0600 user = postfix group = postfix service auth-worker service dict unix_listener dict mode = 0600 user = vmail grou

34、p = vmail rootmail # vim /etc/dovecot/conf.d/15-lda.confprotocol lda mail_plugins = quota postmaster_address = HYPERLINK mailto:postmasterexamp postmasterexamprootmail # vim /etc/dovecot/conf.d/20-imap.confprotocol imap mail_plugins = quota imap_quotarootmail # vim /etc/dovecot/conf.d/20-pop3.confpr

35、otocol pop3 pop3_uidl_format = %08Xu%08Xv mail_plugins = quotarootmail # vim /etc/dovecot/conf.d/90-quota.confplugin quota_rule = *:storage=1Gplugin plugin quota = dict:User quota:proxy:quotaplugin rootmail # vim /etc/dovecot/dovecot-sql.conf.extdriver = mysqlconnect = host=localhost dbname=mail use

36、r=admin password=123123default_pass_scheme = CRAM-MD5user_query = SELECT CONCAT(/var/vmail/, maildir) AS home, 2000 AS uid, 2000 AS gid, CONCAT(*:bytes=, quota) as quota_rule FROM mailbox WHERE username = %u AND active=1password_query = SELECT username AS user, password, CONCAT(/var/vmail/, maildir)

37、 AS userdb_home, 2000 AS userdb_uid, 2000 AS userdb_gid, CONCAT(*:bytes=, quota) as userdb_quota_rule FROM mailbox WHERE username = %u AND active=1rootmail # vim /etc/dovecot/dovecot-dict-sql.conf.extconnect = host=localhost dbname=mail user=admin password=123123map pattern = priv/quota/storage tabl

38、e = quota2 username_field = username value_field = bytesmap pattern = priv/quota/messages table = quota2 username_field = username value_field = messages6、测试SMTP与POP3服务创建虚拟域创建邮箱连接25端口rootmail # telnet localhost 25Trying .Connected to localhost.Escape character is .220 mail.examp ESMTP Postfixehlo ex

39、amp250-mail.examp250-PIPELINING250-SIZE 20480000250-VRFY250-ETRN250-AUTH PLAIN LOGIN CRAM-MD5250-AUTH=PLAIN LOGIN CRAM-MD5250-ENHANCEDSTATUSCODES250-8BITMIME250 DSN连接110端口rootmail # telnet localhost 110Trying .Connected to localhost.Escape character is .+OK Dovecot ready.user HYPERLINK mailto:testex

40、amp testexamp+OKpass test+OK Logged in.已经自动创建邮箱rootmail # ll /var/vmail/examp/test/Maildir/total 40drwx. 2 vmail vmail 4096 Apr 26 05:44 cur-rw. 1 vmail vmail 16384 Apr 26 05:43 dovecot.index.cache-rw. 1 vmail vmail 608 Apr 26 05:44 dovecot.index.log-rw. 1 vmail vmail 95 Apr 26 05:43 dovecot-uidlist

41、-rw. 1 vmail vmail 8 Apr 26 05:43 dovecot-uidvalidity-r-r-r-. 1 vmail vmail 0 Apr 26 05:43 dovecot-uidvalidity.4f986fe9drwx. 2 vmail vmail 4096 Apr 26 05:44 newdrwx. 2 vmail vmail 4096 Apr 26 05:43 tmp收发邮件正常7、安装病毒扫描与垃圾邮件过滤Amavisd-new 及 ClamAV 可从RPMForge软件仓库安装首先，安装amavisd-new、clamav及spamassassin：root

42、mail # yum install amavisd-new clamav clamav-devel clamd spamassassin y安装完毕后，三个新的服务应已被加进系统内： rootmail # chkconfig -list | grep amavisd|clamd|spamassassinamavisd 0:off1:off2:on3:on4:on5:on6:offclamd 0:off1:off2:on3:on4:on5:on6:offspamassassin 0:off1:off2:off3:off4:off5:off6:offspamassassin 这个启动spamd的

43、服务可以被停用，因为Amavisd-new不会应用spamassassin的常驻进程，而是直接载入spamassassin作为一个模块。设定事实上SpamAssassin并不须要特别的设定便可配合Amavisd-new，它可即装即用。这并不等于你无法通过/etc/mail/spamassassin/local.cf域该目录内的自订cf档来设定它。ClamAV的设定存放在/etc/clamd.conf内，我们必须编辑/etc/clamd.conf让ClamAV知道Amavisd-new将会利用本地的UNIX通讯端而不是tcp端口来与它沟通，以及该通讯端在哪里。请如下编辑LocalSocket的设

44、定并备注掉TCPSocket:# /etc/clamd.conf# 设定 clam 的 LocalSocket# 它必须与 /etc/amavisd.conf 內设定吻合#LocalSocket /var/run/clamav/clamd.sock# 备注掉 TCPSocket 这个设定：# TCPSocket 3310Amavisd-new把它的配置文件放在/etc/amavisd.conf中。首先，我们可以通过解除以下数行的注释来停止检查病毒域垃圾邮件（由于下面数行是被注释掉的，因此病毒及垃圾邮件在预设中是被启动的）：# /etc/amavisd.conf:# To disable vir

45、us or spam checks, uncomment the following:# bypass_virus_checks_maps = (1); # controls running of anti-virus code# bypass_spam_checks_maps = (1); # controls running of anti-spam code# $bypass_decode_parts = 1; # controls running of decoders & dearchivers接着，请留意以下数行，纵使它们无须被修改：$max_servers = 2;# num o

46、f pre-forked children (2.30 is common), -m$daemon_user = amavis; # (no default; customary: vscan or amavis), -u$daemon_group = amavis;# (no default; customary: vscan or amavis), -g$inet_socket_port = 10024; # listen on this local TCP port(s)# $notify_method = smtp:10025;# $forward_method = smtp:1002

47、5; # set to undef with milter!$max_servers设定同步执行的Amavisd-new进程数量，而且必须与/etc/postfix/master.cf内的amavisfeed服务的maxproc栏相吻合$daemon_user及$daemon_group应该吻合用来执行Amavisd-new的用户及群组。$inet_socket_port 定义Amavisd-new将会在哪一个tcp端口接纳来自Postfix的连接。$notify_method及$forward_method定义Amavisd-new把邮件重新注入Postfix的途径。以下设定必须被修改（涉及

48、$mydomain和$myhostname时）及解除注释（移除行首的#）：$mydomain = examp; $MYHOME = /var/amavis; $helpers_home = $MYHOME/var; $lock_file = $MYHOME/var/amavisd.lock; $pid_file = $MYHOME/var/amavisd.pid; $myhostname = mail.examp;接着是一些SpamAssassin设定来置换预设的SpamAssassin设定：$sa_tag_level_deflt = 2.0; # add spam info headers

49、if at, or above that level$sa_tag2_level_deflt = 6.2;# add spam detected headers at that level$sa_kill_level_deflt = 6.9;# triggers spam evasive actions (e.g. blocks mail)$sa_dsn_cutoff_level = 10;# spam level beyond which a DSN is not sent# $sa_quarantine_cutoff_level = 25; # spam level beyond whic

50、h quarantine is off$penpals_bonus_score = 8; # (no effect without a storage_sql_dsn database)$penpals_threshold_high = $sa_kill_level_deflt;# dont waste time on hi spam$sa_mail_body_size_limit = 400*1024;# dont waste time on SA if mail is larger$sa_local_tests_only = 0; # only tests which do not req

51、uire internet access?你不一定要修改它们，但是你值得知道它们的存在，因为这里是最方便修改垃圾邮件限制的地方。$sa_tag_level_deflt 指定Amavisd-new由哪一个级别开始写入X-Spam-Flag、X-Spam-Score、X-Spam-Status等垃圾邮件资讯标头，假如你想为所有邮件加入资讯标头，请把此值设为 -999$sa_tag2_level_deflt 指定由哪一个级别开始在垃圾邮件的标头上标签它们。$sa_kill_level_deflt 指定Amavisd-new由哪一个级别开始拦截和扣留邮件。这个用途很大，因为SpamAssassin在预

52、设情况下不会这样做。$sa_dsn_cutoff_level 指定由哪一个级别开始寄件失败通告不会被发送给寄件人。由于多数垃圾邮件寄件者的地址都是伪造的，不为明显的垃圾邮件发送寄件失败通告是最合理的，要不然你只会加剧反向散寄的问题。$sa_quarantine_cutoff_level 指定哪一个级别开始不必扣留垃圾邮件。这个选项预设是被注释掉的，意思是所有邮件都会被扣留。接下来是发送通告的邮件地址：$virus_admin = virusalert$mydomain; # notifications recip.$mailfrom_notify_admin = virusalert$mydo

53、main; # notifications sender$mailfrom_notify_recip = virusalert$mydomain; # notifications sender$mailfrom_notify_spamadmin = spam.police$mydomain; # notifications sender你大概会将它们设定为postmaster$mydomain或其它你想收到垃圾邮件通告的邮箱。最后，我们需要为ClamAV的部份解除注释：# HYPERLINK http:/www.clama/ http:/www.clama/ClamAV-clamd, &ask

54、_daemon, CONTSCAN n, /var/run/clamav/clamd.sock, qr/bOK$/m, qr/bFOUND$/m, qr/.*?: (?!Infected Archive)(.*) FOUND$/m ,请留意/var/run/clamav/clamd.sock这个设定必须与我们先前在/etc/clamd.conf内输入的LocalSocket /var/run/clamav/clamd.sock设定相吻合。Postfix的相关设定然后我们需要设定Postfix内的服务（/etc/postfix/master.cf）好让邮件会被传给Amavisd-new进行过滤及

55、再次注入Postfix。打开/etc/postfix/master.cf加入以下名为amavisfeed的服务：# =# service type private unpriv chroot wakeup maxproc command + args# (yes) (yes) (yes) (never) (100)# =#amavisfeed unix - - n - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o smtp_tls_note_starttls_offer=no -o disa

56、ble_dns_lookups=yes -o max_use=20请留意在maxproc栏内的数值（2）必须要与/etc/amavisd.conf内的$max_servers设定吻合。有关各选项的详细解释请参阅Amavisd-new的文档（/usr/share/doc/amavisd-new-2.6.6/README.postfix.html）。然后我们定义一个专用的服务把邮件重新注入Postfix。我们为此在/etc/postfix/master.cf内加入一个在localhost()的tcp 10025端口（/etc/amavisd.conf的预设值）上监听的smtp服务：# =# ser

57、vice type private unpriv chroot wakeup maxproc command + args# (yes) (yes) (yes) (never) (100)# =:10025 inet n - n - - smtpd -o content_filter= -o smtpd_delay_reject=no -o smtpd_client_restrictions=permit_mynetworks,reject -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_

58、restrictions=permit_mynetworks,reject -o smtpd_data_restrictions=reject_unauth_pipelining -o smtpd_end_of_data_restrictions= -o smtpd_restriction_classes= -o mynetworks=/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o smtpd_client_connection_count_limit

59、=0 -o smtpd_client_connection_rate_limit=0 -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_milters,no_address_mappings -o local_header_rewrite_clients= -o smtpd_milters= -o local_recipient_maps=以上两项首行前面一定不能有空格，否则会出错最后，在/etc/postfix/main.cf加入以下设定来启用邮件过滤：content_filter

60、 = amavisfeed:10024在/etc/postfix/master.cf作出改动后，我们必须重新加载postfix，好让这些改动能生效：rootmail # postfix reload测试首先，启动clamd及amavisd服务：rootmail # /etc/init.d/clamd startrootmail # /etc/init.d/amavisd start现在利用telnet测试amavisd这个服务正在:10024上监听：rootmail # telnet localhost 10024Trying .Connected to localhost.Escape ch