參考文檔：
http://blog.5ilinux.com/archives/2006/05/postfix_cyrussa.html
http://www.extmail.org/forum/archive/2/0510/563.html

wget http://surfnet.dl.sourceforge.net/sourceforge/courier/courier-imap-4.1.1.tar.bz2

tar jvxf courier-imap-4.1.1.tar.bz2

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

#如果編譯courier-authlib沒有安裝在默認路徑，必須指定這個，如果之前編譯courier-authlib加了--without- stdheaderdir，就不需要指定了

make

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，為用戶提供pop3服務：
vi /usr/local/courier-imap/etc/pop3d
POP3DSTART=yes
?注：如果你想為用戶提供IMAP服務，可以在"/usr/local/courier-imap/etc/imapd"文件中設置"IMAPDSTART=yes"。

?設置Courier-IMAP開機自動運行：
cp courier-imap.sysvinit /etc/rc.d/init.d/imapd
chmod 755 /etc/rc.d/init.d/imapd
chkconfig --add imapd

測試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@example.com


+OK Password required.
pass 123
+OK logged in.
list
+OK POP3 clients that break here, they violate STD53.
.
quit
+OK Bye-bye.
Connection closed by foreign host.