[Exim] authentication with PAM

Hello,

I'm unable to authenticate with exim and outlook express.

here is the auth.log:

May 4 01:59:40 debian PAM-warn[29497]: service: exim [on terminal:
<unknown>]
May 4 01:59:40 debian PAM-warn[29497]: user: (uid=8) -> ggabor [remote:
?nobody@?nowhere]
May 4 01:59:40 debian PAM_unix[29497]: authentication failure; (uid=8)
-> **unknown** for exim service

the mainlog:

2001-05-04 02:06:35 Authentication failed for debian.localnet
(windoz) [192.168.10.13]: 535 Incorrect authentication data

and the configuration file:

login:
driver = plaintext
public_name = LOGIN
server_prompts = "Username:: : Password::"
server_condition = "${if pam{$1:$2}{1}{0}}"
server_set_id = $1


I think the problem is that, that exim tries to authenticate as user mail
(uid 8) and it is unable to. Is there a nice solution to this problem?

Thanks in advance,
Gabor