courier-authlib、courier-imap、maildrop、cyrus-sasl的编译安装及与postfix的关联

./configure --prefix=/usr/local/courier-authlib --without-stdheaderdir --with-authdaemonvar=/var/spool/authdaemon --with-authmysql --with-authmysqlrc=/usr/local/courier-authlib/etc/authmysqlrc --with-mailuser=vuser --with-mailgroup=vgroup --with-authdaemonrc=/usr/local/courier-authlib/etc/authdaemonrc --with-redhat

make && make install

./configure --prefix=/usr/local/courier-imap --enable-unicode --disable-root-check --with-trashquota --without-ipv6 CPPFLAGS='-I/usr/local/courier-authlib/include' COURIERAUTHCONFIG='/usr/local/courier-authlib/bin/courierauthconfig'

ln -s /usr/local/courier-authlib/bin/courierauthconfig /usr/bin/courierauthconfig

make && make install

./configure --prefix=/usr/local/cyrus-sasl --disable-sample --disable-saslauthd --disable-pwcheck --disable-cram --disable-digest --disable-krb4 --disable-gssapi --disable-anon --enable-plain --enable-login --enable-sql --disable-ntlm --disable-otp --disable-srp --disable-srp-setpass --with-authdaemond=/var/spool/authdaemon/socket

make && make install

ln -s /usr/local/cyrus-sasl/lib/sasl2 /usr/lib/sasl2

＃添加以下两行到"/etc/ld.so.conf"，并执行ldconfig命令.
/usr/local/cyrus-sasl/lib/sasl2
/usr/local/cyrus-sasl/lib

＃关闭或删除下列文件,也避免与新版2.1.22中的文件混淆。
mv /usr/lib/libsasl2.a /usr/lib/libsasl2.a.OFF
mv /usr/lib/libsasl2.la /usr/lib/libsasl2.la.OFF
mv /usr/lib/libsasl2.so.2.0.19 /usr/lib/libsasl2.so.2.0.19.OFF
mv /usr/lib/sasl2 /usr/lib/sasl2.OFF
rm /usr/lib/libsasl2.so
rm /usr/lib/libsasl2.so.2

root@net-server:/# ln -sv /usr/local/cyrus-sasl/lib/* /usr/lib

＃postfix 2.3以后的版本(本文是安装postfix-2.4.6)会分别在/usr/local/lib和/usr/local/include中搜索sasl库文件及头文件，故还须将其链接至此目录中：

ln -sv /usr/local/cyrus-sasl/lib/* /usr/local/lib
ln -sv /usr/local/cyrus-sasl/include/sasl/* /usr/local/include

＃创建运行时需要的目录并调试启动

mkdir -pv /var/state/saslauthd
/usr/local/cyrus-sasl/sbin/saslauthd -a shadow pam -d

＃启动并测试
/usr/local/cyrus-sasl/sbin/saslauthd -a shadow pam
/usr/local/cyrus-sasl/sbin/testsaslauthd -u root -p root用户密码

# 设置开机自动启动
echo "/usr/local/cyrus-sasl/sbin/saslauthd -a shadow pam" >>/etc/rc.d/rc.local

＃我的系统中没有此文件,locate与找不出来，我是自己建立该文件。
vim /usr/local/cyrus-sasl/lib/sasl2/smtpd.conf

pwcheck_method: saslauthd
log_level: 3
mech_list: PLAIN LOGIN
authdaemond_path:/var/spool/authdaemon/socket

perl -e 'use MIME::Base64; print encode_base64("postmaster\@extmail.org")'
perl -e 'use MIME::Base64; print encode_base64("extmail")'