为什么 SquirrelMail 总是验证失败？

maxzhongcn

系统环境：Gentoo + Sendmail + Cyrus-imap + SquirrelMail
主机地址：microweb.3322.org
动态IP。
为什么登录 SquirrelMail 登录总是验证失败？每个用户都不行。
下面是我的一些端口telnet的结果：

#telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 microweb.3322.org ESMTP Sendmail 8.12.9/8.12.9; Tue, 15 Jul 2003 20:57:06 +0800

#telnet localhost 110
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
+OK microweb.3322.org Cyrus POP3 v2.1.12 server ready <1019086687.1058273877@microweb.3322.org>

#telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK microweb.3322.org Cyrus IMAP4 v2.1.12 server ready