Postfix配置过程详解

作者：duoduo848511 | 来源：互联网 | 2014-05-28 08:44

很早就想试下Linux下的Postfix服务，也看了网上很多相关的教程，但是每当我看到那长长的篇幅就打退堂鼓了，但是有些东西在技术的道路上始终是要经历和面对的，这些天就一直在鼓捣着这东东，现在把自已的经历写出来，希望能对大家有点用．对于大侠来讲，这些

　很早就想试下Linux下的Postfix服务，也看了网上很多相关的教程，但是每当我看到那长长的篇幅就打退堂鼓了，但是有些东西在技术的道路上始终是要经历和面对的，这些天就一直在鼓捣着这东东，现在把自已的经历写出来，希望能对大家有点用．对于大侠来讲，这些算不了什么，但至少相对我这种还在Linux门外徊徘的人来说，它是我学习的一个历程．其中蓝色字体需用户输入，白色字体是系统显示，红色字体是我加入的说明．

系统相关

[root@redhat ~]#hostname 　　　　　　//主机名称
redhat.test.com
[root@redhat ~]# cat /proc/version 　　　　//系统版本
Linux version 2.6.9-5.EL(gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4))
#1 Wed Jan 5 19:22:18 EST 2005
[root@redhat ~]# ifconfig eth0 　　　　　　//IP地址
eth0 Link encap:Ethernet HWaddr 00:0C:29:1D:E1:68
inet addr:192.168.44.80 Bcast:192.168.44.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe1d:e168/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3193 errors:3 dropped:0 overruns:0 frame:0
TX packets:331 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:423261 (413.3 KiB) TX bytes:35564 (34.7 KiB)
Interrupt:10 Base address:0x1400

软件相关

　　在进行配置的过程中，除了各种配置文件的录入问题导致出错外，还有一个比较容易出问题的地方就在于安装perl相关支持模块．在测试中，我尝试删除所有的perl及其相关模块，然后再重新安装perl基本模块，而其它的支持模块全部采用源码的方式，经统计共有67个之多．所以如果你也是按我的方法来安装配置的话，请先将这些东东下载下来，下载的方法是登录 http://search.cpan.org/search ，然后在搜索栏中输入下列相关的模块，如要下载URI，方法见下图，其它的类同．安装时请按从前往后从左向右的先后顺序进行．

1	2	3	4	5
BerKeleyDB	Comperss-Raw-zlib	IO-Compress-Base	IO-Compress-Zlib	Compress-Zlib
IO-Zlib	Array-Compcre	Sub-Updevel	Test-Simple	Test-Exception
Tree-Dag-Node	Test-Warn	Net-SsLeay	IO-Socket-SSL	IO-String
Algorithm-Diff	Text-Diff	Archive-Tar	Archive-Zip	DBI
DBD-Mysql	IO-Socket-INET6	IP-country	File-Temp	NetAddr-IP
NET-CIDR-Lite	NET-IP	NET-Ident	Digest-SHA	Digest-SHAL
Digest-HMAC	NET-DNS	Version	NET-DNS-Resolver -Programmable	HTML-Tagset
HTML-Parser	Extutils-CBuilder	Encode-Detect	Extutils-Parsexs	Error
GD	GD-securityImage	GD-securityImage -util	Unix-Syslog	Sys-Hostname -Long
Regexp-Common	URI	Mail-SPF	Mail-SPF-Query	TimeDate
Pod-Escapes	Pod-Simple	Test-Pod	MailTools	Mail-DKIM
Crypt-Openssl- Random	Crypt-Openssl-RSA	Mail-DomainKeys	MIME-Tools	Libww-Perl
SpamAssassin	Convery-TNEF	Convert-UUlib	NET-Server	Time-HiRes
File-Tail	Log-Log4perl	22.1 Socket6-0.19	41.1 PerlMagick

卸载系统原有组件

　　因为这里的安装方式都是采用源码，所以如果系统中存在旧有的版本，则会引起冲突，这里要做的是把一些和源码包冲突的软件卸载．在使用命令进行查询时，当执行完命令后没有提示则表示系统未安装查询的组件，否则请卸载查询出来的组件．

[root@redhat ~]# rpm -qa | grep httpd //查询是否已安装软件
[root@redhat ~]# rpm -qa | grep mysql
[root@redhat ~]# rpm -qa | grep php
[root@redhat ~]# rpm -qa |grep sasl
cyrus-sasl-md5-2.1.19-5.EL4　　　　　　　//系统已安装有软件
cyrus-sasl-2.1.19-5.EL4
cyrus-sasl-plain-2.1.19-5.EL4
cyrus-sasl-devel-2.1.19-5.EL4
[root@redhat ~]# rpm -e --nodeps cyrus-sasl-md5-2.1.19-5.EL4 cyrus-sasl-2.1.19-5.EL4 \
cyrus-sasl-plain-2.1.19-5.EL4 cyrus-sasl-devel-2.1.19-5.EL4 　　//卸载SASL
[root@redhat ~]# rpm -qa |grep sendmail
sendmail-8.13.1-2
[root@redhat ~]# service sendmail stop
Shutting down sendmail: [ OK ]
Shutting down sm-client: [ OK ]
[root@redhat ~]# rpm -e --nodeps sendmail
[root@redhat ~]#

[root@redhat ~]# rpm -qa |grep perl
perl-HTML-Tagset-3.03-30
perl-XML-Parser-2.34-5
perl-libxml-enno-1.02-31
perl-Digest-HMAC-1.01-13
perl-XML-NamespaceSupport-1.08-6
perl-XML-Twig-3.13-6
perl-XML-LibXML-1.58-1
perl-5.8.5-12
perl-URI-1.30-4
perl-DateManip-5.42a-3
perl-HTML-Parser-3.35-6
perl-libwww-perl-5.79-5
perl-libxml-perl-0.07-30
perl-XML-Encoding-1.01-26
perl-Digest-SHA1-2.07-5
perl-Net-DNS-0.48-1
perl-Convert-ASN1-0.18-3
perl-XML-Grove-0.46alpha-27
perl-LDAP-0.31-5
perl-XML-LibXML-Common-0.13-7
perl-Filter-1.30-6
perl-Parse-Yapp-1.05-32
perl-XML-Dumper-0.71-2
perl-Time-HiRes-1.55-3
perl-XML-SAX-0.12-7
perl-Crypt-SSLeay-0.51-5
[root@redhat ~]# //卸载perl相关
[root@redhat ~]# rpm -e --nodeps perl-XML-NamespaceSupport-1.08-6 \
perl-XML-Twig-3.13-6 perl-XML-LibXML-1.58-1 perl-URI-1.30-4 \
perl-DateManip-5.42a-3 perl-HTML-Parser-3.35-6 perl-libwww-perl-5.79-5 \
perl-libxml-perl-0.07-30 perl-XML-Encoding-1.01-26 perl-Digest-SHA1-2.07-5 \
perl-Net-DNS-0.48-1 perl-Convert-ASN1-0.18-3 perl-XML-Grove-0.46alpha-27 \
perl-LDAP-0.31-5 perl-XML-LibXML-Common-0.13-7 perl-Filter-1.30-6 \
perl-Parse-Yapp-1.05-32 perl-XML-Dumper-0.71-2 perl-Time-HiRes-1.55-3 \
perl-XML-SAX-0.12-7 perl-Crypt-SSLeay-0.51-5 perl-HTML-Tagset-3.03-30 \
perl-XML-Parser-2.34-5 perl-libxml-enno-1.02-31 perl-Digest-HMAC-1.01-13

一：增加系统相关的用户和组

[root@redhat ~]# groupadd mysql
[root@redhat ~]# groupadd vmail
[root@redhat ~]# groupadd postfix
[root@redhat ~]# groupadd postdrop
[root@redhat ~]# groupadd amavis
[root@redhat ~]# groupadd clamav
[root@redhat ~]# groupmod -g 1001 vmail
[root@redhat ~]# useradd mysql -g mysql
[root@redhat ~]# useradd vmail -g vmail -u 1001
[root@redhat ~]# useradd postfix -g postfix
[root@redhat ~]# useradd amavis -g amavis
[root@redhat ~]# useradd clamav -g clamav

　　其中用户和组的作用相信大家看了前面的软件相关大概可以看出其作用了，其中vmail是用来登录Webmail的帐号，而postdrop则是在邮件中起postdrop的作用．

二：安装Mysql

　　1：安装

[root@redhat tmp]# mv mysql-5.0.41-linux-i686 /usr/local/mysql
[root@redhat tmp]# cd /usr/local/mysql/
[root@redhat mysql]# chown -R root . //注意这些地方的点号
[root@redhat mysql]# chown -R mysql data
[root@redhat mysql]# chown -R mysql data/mysql/.
[root@redhat mysql]# chgrp -R mysql .
[root@redhat mysql]# cp ./support-files/my-medium.cnf /etc/my.cnf
[root@redhat mysql]# ./scripts/mysql_install_db --user=mysql
Installing MySQL system tables...
OK
Filling help tables...
OK

　　2：启动及共享链接库

[root@redhat mysql]# bin/mysqld_safe --user=mysql &
[1] 29422
[root@redhat mysql]# Starting mysqld daemon with databases from /usr/local/mysql/data

[root@redhat mysql]#/usr/local/mysql/bin/mysqlshow -p
Enter password: //测试数据库，如有下面显示则表示成功
+--------------------+
| Databases |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
[root@redhat mysql]#
[root@redhat mysql]# echo "/usr/local/mysql/lib" >> /etc/ld.so.conf
[root@redhat mysql]# ldconfig -v　　　　　　//加入动态链接库中

　　3：加入到自动运行队列

[root@redhat mysql]# cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld
[root@redhat mysql]# chmod 700 /etc/rc.d/init.d/mysqld
[root@redhat mysql]# chkconfig --add mysqld
[root@redhat mysql]# chkconfig --level 345 mysqld on
[root@redhat mysql]# export PATH=$PATH:/usr/local/mysql/bin
[root@redhat mysql]# //设置mysql的运行路径

三：安装Openssl

　　因为Openssl在这里的作用不是很明显，而且系统中默认一般都自带有，所以这里没有采用源码的方式安装，在这里只是做一次查询，如果想用源码的方式，这个和普通的编译方式一样，没什么特别要求的地方．

[root@redhat tmp]# rpm -qa |grep ssl
openssl-devel-0.9.7a-43.1
openssl-0.9.7a-43.1
xmlsec1-openssl-1.2.6-3

四：安装BerkeleyDB

　　安装这个软件的原因是因为后面的Perl组件包中必须要有它的支持才能进行下去，所以这个是不能省的．

　　1：安装

[root@redhat tmp]#tar zxvf db-4.5.20.tar.gz
[root@redhat tmp]# cd db-4.5.20/build_unix
[root@redhat build_unix]#../dist/configure --prefix=/usr/local/BerkeleyDB
[root@redhat build_unix]#make
[root@redhat build_unix]#make install

　　2：禁用和移除旧版本文件

[root@redhat build_unix]# mv /usr/include/db4 /usr/include/db4.off
[root@redhat build_unix]# rm /usr/include/db_cxx.h
rm: remove symbolic link `/usr/include/db_cxx.h'? y
[root@redhat build_unix]# rm /usr/include/db.h
rm: remove symbolic link `/usr/include/db.h'? y
[root@redhat build_unix]#rm /usr/include/db_185.h
rm: remove symbolic link `/usr/include/db_185.h'? y
[root@redhat build_unix]#

　　3：链接新文件到动态库

[root@redhat build_unix]# ln -sv /usr/local/BerkeleyDB/include /usr/include/db4
create symbolic link `/usr/include/db4' to `/usr/local/BerkeleyDB/include'
[root@redhat build_unix]# ln -sv /usr/local/BerkeleyDB/include/db.h /usr/include/db.h
create symbolic link `/usr/include/db.h' to `/usr/local/BerkeleyDB/include/db.h'
[root@redhat build_unix]# ln -sv /usr/local/BerkeleyDB/include/db_cxx.h /usr/include/db_cxx.h
create symbolic link `/usr/include/db_cxx.h' to `/usr/local/BerkeleyDB/include/db_cxx.h'
[root@redhat build_unix]# echo "/usr/local/BerkeleyDB/lib" >> /etc/ld.so.conf
[root@redhat build_unix]# ldconfig -v

五：安装Apache

　　安装Apache有两个要注意的地方，因为我这里用的Postfix的后台管理是extman这个程序，而它是通过CGI的方式来进行管理的，所以这里启用了suexec的功能，还有一个是关于网站的存放路径的，如果不指定，那么在启用suexec后会出现 suexec-docroot的错误．

　　1：安装

[root@redhat httpd]# tar zxvf httpd-2.2.4.tar.gz
[root@redhat httpd]# cd httpd-2.2.4
[root@redhat httpd-2.2.4]# ./configure --prefix=/usr/local/httpd --syscOnfdir=/etc/httpd \
--enable-so --enable-ssl --enable-track-vars --enable-rewrite \
--with-zlib --enable-mods-shared=most --enable-suexec --with-suexec-caller=daemon \
--with-suexec-docroot=/var/www/
[root@redhat httpd-2.2.4]# make
[root@redhat httpd-2.2.4]# make install

　　2：加入到自动运行队列

[root@redhat httpd-2.2.4]# echo "/usr/local/httpd/bin/apachectl start" >> /etc/rc.local

六：安装GD库

　　GD库的主要作用是配置相关的图形及字符的正确显示，包括类似验证码的功能和后面的图形日志的显示．

　　1：安装libpng

[root@redhat php]# tar zxvf libpng-1.2.16.tar.gz
[root@redhat php]# cd libpng-1.2.16
[root@redhat libpng-1.2.16]# ./configure --prefix=/usr/local/png
[root@redhat libpng-1.2.16]# make
[root@redhat libpng-1.2.16]# make install
[root@redhat libpng-1.2.16]# ln -sv /usr/local/png/lib/* /usr/lib/

　　2：安装jpeg

[root@redhat php]#mkdir /usr/local/jpeg
[root@redhat php]# mkdir /usr/local/jpeg/bin
[root@redhat php]#mkdir /usr/local/jpeg/lib
[root@redhat php]# mkdir /usr/local/jpeg/include
[root@redhat php]# mkdir /usr/local/jpeg/man
[root@redhat php]# mkdir /usr/local/jpeg/man/man1
[root@redhat php]# tar zxvf jpegsrc.v6b.tar.gz
[root@redhat php]# cd jpeg-6b/
[root@redhat jpeg-6b]# ./configure --prefix=/usr/local/jpeg --enable-shared --enable-static
[root@redhat jpeg-6b]# make
[root@redhat jpeg-6b]# make install
[root@redhat jpeg-6b]# ln -sv /usr/local/jpeg/lib/* /usr/lib/

　　3：安装freetype

[root@redhat php]# tar zxvf freetype-2.3.2.tar.gz
[root@redhat php]# cd freetype-2.3.2
[root@redhat freetype-2.3.2]# ./configure --prefix=/usr/local/freetype2
[root@redhat freetype-2.3.2]# make
[root@redhat freetype-2.3.2]#make install

　　4：安装fontconfig

[root@redhat php]# tar zxvf fontconfig-2.4.0.tar.gz
[root@redhat php]# cd fontconfig-2.4.0
[root@redhat fontconfig-2.4.0]# ./configure --prefix=/usr/local/fontconfig \
--with-freetype-cOnfig=/usr/local/freetype2/bin/freetype-config
[root@redhat fontconfig-2.4.0]# make
[root@redhat fontconfig-2.4.0]# make install

　　5：安装xmkmf

//安装xmkmf的原因是编译xpm时要用来这个工具
[root@redhat php]# rpm -ivh freetype-devel-2.1.9-1.i386.rpm
warning: freetype-devel-2.1.9-1.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
Preparing... ########################################### [100%]
1:freetype-devel ########################################### [100%]
[root@redhat php]# rpm -ivh fontconfig-devel-2.2.3-7.i386.rpm
warning: fontconfig-devel-2.2.3-7.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
Preparing... ########################################### [100%]
1:fontconfig-devel ########################################### [100%]
[root@redhat php]# rpm -ivh xorg-x11-devel-6.8.1-23.EL.i386.rpm
warning: xorg-x11-devel-6.8.1-23.EL.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
Preparing... ########################################### [100%]
1:xorg-x11-devel ########################################### [100%]
[root@redhat php]#

　　6：安装xpm

//在rhel5中有直接的rpm包，librxpm.rpm libxpm-devel.rpm
[root@redhat php]# tar zxvf xpm-3.4k.tar.gz
[root@redhat php]# cd xpm-3.4k
[root@redhat xpm-3.4k]# xmkmf -a
[root@redhat xpm-3.4k]# make
[root@redhat xpm-3.4k]# make install

　　7：安装gd

[root@redhat tmp]# tar zxvf gd-2.0.34.tar.gz
[root@redhat php]# cd gd-2.0.34
[root@redhat gd-2.0.34]#./configure --prefix=/usr/local/gd --with-png=/usr/local/png/ \
--with-jpeg=/usr/local/jpeg/ --with-freetyp=/usr/local/freetype2/ \
--with-fOntconfig=/usr/local/fontconfig/--with-xpm
[root@redhat gd-2.0.34]# cp /usr/local/png/include/png.h ./
[root@redhat gd-2.0.34]# cp /usr/local/png/include/pngconf.h ./
[root@redhat gd-2.0.34]# make
[root@redhat gd-2.0.34]# make install

七：安装courier-authlib

　　1：安装

[root@redhat tmp]# tar jxvf courier-authlib-0.59.3.tar.bz2
[root@redhat tmp]# cd courier-authlib-0.59.3
[root@redhat courier-authlib-0.59.3]# ./configure --with-redhat --with-authmysql=yes \
--with-mailuser=vmail --with-mailgroup=vmail --with-mysql-libs=/usr/local/mysql/lib \
--with-mysql-includes=/usr/local/mysql/include \
--prefix=/usr/local/authlib --without-stdheaderdir
[root@redhat courier-authlib-0.59.3]# make
[root@redhat courier-authlib-0.59.3]# make install
[root@redhat courier-authlib-0.59.3]# make install-configure
[root@redhat courier-authlib-0.59.3]# grep "authdaemonvar" \
/usr/local/authlib/etc/authlib/authdaemonrc //找出配置文件中authdaemonvar的设置
##NAME: authdaemonvar:2
# authdaemonvar is here, but is not used directly by authdaemond. It's
authdaemOnvar=/usr/local/authlib/var/spool/authdaemon

　　2：更改相关配置文件

[root@redhat courier-authlib-0.59.3]# vi /usr/local/authlib/etc/authlib/authdaemonrc
authmodulelist="authmysql" //第27行
authmodulelistorig="authmysql" //第34行
DEBUG_LOGIN=2 //第75行

//此文件中请不要使用空格符，应使用TAB键
[root@redhat courier-authlib-0.59.3]# vi /usr/local/authlib/etc/authlib/authmysqlrc
MYSQL_SERVER 　　localhost //26行
MYSQL_USERNAME 　extmail //27行
MYSQL_PASSWORD 　extmail //28行
MYSQL_DATABASE 　extmail //68行
MYSQL_SOCKET 　/tmp/mysql.sock //49行
MYSQL_USER_TABLE　 mailbox //75行
MYSQL_CLEAR_PWFIELD　 password //84行
DEFAULT_DOMAIN 　test.com //97行
MYSQL_UID_FIELD 　'1001' //105行
MYSQL_GID_FIELD 　'1001' //111行
MYSQL_LOGIN_FIELD　 username //120行
MYSQL_HOME_FIELD 　concat('/var/mailbox/',maildir) 　 //125行
MYSQL_NAME_FIELD 　name 　　　　 //131行
MYSQL_MAILDIR_FIELD　 concat('/var/mailbox/',maildir) 　//142行
MYSQL_QUOTA_FIELD 　concat(quota,'S') 　　//157行

　　3：共享链接库

[root@redhat courier-authlib-0.59.3]# echo "/usr/local/authlib/lib/courier-authlib" >> /etc/ld.so.conf
[root@redhat courier-authlib-0.59.3]# ldconfig -v

　　4：启动及加入到自动运行队列

[root@redhat courier-authlib-0.59.3]# cp courier-authlib.sysvinit /etc/init.d/courier-authlib
[root@redhat courier-authlib-0.59.3]# chmod 755 /etc/init.d/courier-authlib
[root@redhat courier-authlib-0.59.3]# chkconfig --add courier-authlib
[root@redhat courier-authlib-0.59.3]# chkconfig --level 2345 courier-authlib on
[root@redhat courier-authlib-0.59.3]# service courier-authlib start
Starting Courier authentication services: authdaemond
[root@redhat courier-authlib-0.59.3]# chmod +x /usr/local/authlib/var/spool/authdaemon
[root@redhat courier-authlib-0.59.3]#

八：安装SASL

　　1：安装

[root@redhat tmp]# tar zxvf cyrus-sasl-2.1.21.tar.gz
[root@redhat tmp]# cd cyrus-sasl-2.1.21
[root@redhat cyrus-sasl-2.1.21]# ./configure --prefix=/usr/local/sasl2 \
--disable-anon -enable-plain --enable-login --enable-sql \
--with-mysql=/usr/local/mysql --with-mysql-includes=/usr/local/mysql/include \
--with-mysql-libs=/usr/local/mysql/lib \
--with-authdaemOnd=/usr/local/authlib/var/spool/authdaemon/socket
[root@redhat cyrus-sasl-2.1.21]# patch －p1 < sasl.patch　//只在出现下面的错时才用
[root@redhat cyrus-sasl-2.1.21]# make
[root@redhat cyrus-sasl-2.1.21]# make install

　　如果在编译的过程中出现如"client.c:64: error: static declaration of 'global_callbacks' follows non-static declaration saslint.h:112…"，需要加一个补丁程序，然后再执行编译过程。我的在rhel4下没出现错误，但在rhel5下出现错误．文件的内容如下：

[root@redhat cyrus-sasl-2.1.21]# vi sasl.patch
--- cyrus-sasl-2.1.20/lib/client.c~ 2003-11-11 11:26:06.000000000 -0500
+++ cyrus-sasl-2.1.20/lib/client.c 2005-05-31 22:34:14.000000000 -0400
@@ -61,7 +61,7 @@

static cmech_list_t *cmechlist; /* global var which holds the list */

-static sasl_global_callbacks_t global_callbacks;
+sasl_global_callbacks_t global_callbacks;

static int _sasl_client_active = 0;

　　2：共享链接库

[root@redhat cyrus-sasl-2.1.21]# mv /usr/lib/sasl2 /usr/lib/sasl2.OFF
[root@redhat cyrus-sasl-2.1.21]# ln -sv /usr/local/sasl2/lib/* /usr/lib
create symbolic link `/usr/lib/libsasl2.la' to `/usr/local/sasl2/lib/libsasl2.la'
create symbolic link `/usr/lib/libsasl2.so' to `/usr/local/sasl2/lib/libsasl2.so'
create symbolic link `/usr/lib/libsasl2.so.2' to `/usr/local/sasl2/lib/libsasl2.so.2'
create symbolic link `/usr/lib/libsasl2.so.2.0.21' to `/usr/local/sasl2/lib/libsasl2.so.2.0.21'
create symbolic link `/usr/lib/sasl2' to `/usr/local/sasl2/lib/sasl2'
[root@redhat cyrus-sasl-2.1.21]# ln -sv /usr/local/sasl2/lib/* /usr/local/lib
create symbolic link `/usr/local/lib/libsasl2.la' to `/usr/local/sasl2/lib/libsasl2.la'
create symbolic link `/usr/local/lib/libsasl2.so' to `/usr/local/sasl2/lib/libsasl2.so'
create symbolic link `/usr/local/lib/libsasl2.so.2' to `/usr/local/sasl2/lib/libsasl2.so.2'
create symbolic link `/usr/local/lib/libsasl2.so.2.0.21' to `/usr/local/sasl2/lib/libsasl2.so.2.0.21'
create symbolic link `/usr/local/lib/sasl2' to `/usr/local/sasl2/lib/sasl2'
[root@redhat cyrus-sasl-2.1.21]#ln -sv /usr/local/sasl2/include/sasl/* /usr/local/include
create symbolic link `/usr/local/include/hmac-md5.h' to `/usr/local/sasl2/include/sasl/hmac-md5.h'
create symbolic link `/usr/local/include/md5global.h' to `/usr/local/sasl2/include/sasl/md5global.h'
create symbolic link `/usr/local/include/md5.h' to `/usr/local/sasl2/include/sasl/md5.h'
create symbolic link `/usr/local/include/prop.h' to `/usr/local/sasl2/include/sasl/prop.h'
create symbolic link `/usr/local/include/sasl.h' to `/usr/local/sasl2/include/sasl/sasl.h'
create symbolic link `/usr/local/include/saslplug.h' to `/usr/local/sasl2/include/sasl/saslplug.h'
create symbolic link `/usr/local/include/saslutil.h' to `/usr/local/sasl2/include/sasl/saslutil.h'
[root@redhat cyrus-sasl-2.1.21]# mkdir -pv /var/state/saslauthd
mkdir: created directory `/var/state'
mkdir: created directory `/var/state/saslauthd'
[root@redhat cyrus-sasl-2.1.21]# echo "/usr/local/sasl2/lib" >> /etc/ld.so.conf
[root@redhat cyrus-sasl-2.1.21]# echo "/usr/local/sasl2/lib/sasl2" >> /etc/ld.so.conf
[root@redhat cyrus-sasl-2.1.21]# ldconfig -v

　　3：启动及加入到自动运行队列

[root@redhat cyrus-sasl-2.1.21]# echo "/usr/local/sasl2/sbin/saslauthd -a shadow pam">>/etc/rc.local
[root@redhat cyrus-sasl-2.1.21]# /usr/local/sasl2/sbin/saslauthd -a shadow pam

　　4：新建配置文件

[root@redhat cyrus-sasl-2.1.21]# vi /usr/local/lib/sasl2/smtpd.conf
pwcheck_method:authdaemond
mech_list:PLAIN LOGIN
log_level:3
authdaemond_path:/usr/local/authlib/var/spool/authdaemon/socket

过程写得比较详细，所以感觉有点长，慢慢来吧，下回再继续了．