[Exim] PAM

Hi!

///////////////// I've enabled PAM authenticator:

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

plain:
    driver = plaintext
    public_name = PLAIN
    server_condition = ${if pam{$2:$3}{1}{0}}
    server_set_id = $2

///////////////// I've tested 3 possible configurations:

0.] whithout /etc/pam.d/exim

1.] /etc/pam.d/exim

#%PAM-1.0
auth         required        /lib/security/pam_permit.so

2.] /etc/pam.d/exim

#%PAM-1.0
auth required /lib/security/pam_unix.so
auth required /lib/security/pam_tally.sofile=/var/log/faillog onerr=succeed no_magic_root
account required /lib/security/pam_tally.so deny=0 file=/var/log/faillog onerr=succeed
account required /lib/security/pam_unix.so

(btw it seems exim even doesn't try to talk to PAM)

///////////////// EXTENDED LOG:

mar 17 03:30:37 xxxxx exim: SMTP<< AUTH LOGIN
mar 17 03:30:37 xxxxx exim:
mar 17 03:30:37 xxxxx exim:
mar 17 03:30:37 xxxxx exim: Running PAM authentication for user "my_user"
mar 17 03:30:37 xxxxx exim: PAM error: Authentication failure
mar 17 03:30:37 xxxxx exim: login authenticator:
mar 17 03:30:37 xxxxx exim:   $1 = my_user
mar 17 03:30:37 xxxxx exim:   $2 = ***********
mar 17 03:30:37 xxxxx exim: expanded string: 0
mar 17 03:30:37 xxxxx exim:
mar 17 03:30:37 xxxxx exim: LOG: 0 MAIN REJECT
mar 17 03:30:37 xxxxx exim:   Authentication failed for gw-int1
                              (SIEFCA) [x.x.x.x]: 535 Incorrect
                              authentication data
Mar 17 03:30:37 xxxxx exim[31558]: 2001-03-17 03:30:37 Authentication
                                   failed for xxxxx (SIEFCA) [x.x.x.x]: 
                                   535 Incorrect authentication data

What is wrong here?

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