Hi, how come that exim can not authenticate users using PAM? ====================== PLAIN: driver = plaintext server_set_id = $auth2 server_prompts = : server_condition = ${if pam{$auth2:$auth3}{yes}{no}} server_advertise_condition = ${if def:tls_cipher } server_debug_print = "auth: $1 $2 $3" ====================== 2969 SMTP<< AUTH PLAIN AGp2AGdsdWViaXJk 2969 PLAIN authenticator server_condition: 2969 $auth1 = 2969 $auth2 = user 2969 $auth3 = password 2969 $1 = 2969 $2 = user 2969 $3 = password 2969 auth: user password 2969 Running PAM authentication for user "user" 2969 PAM error: Authentication failure 2969 expanded string: no 2969 SMTP>> 535 Incorrect authentication data ======================== unix_chkpwd[2928]: check pass; user unknown unix_chkpwd[2928]: password check failed for user (user) exim: pam_unix(exim:auth): authentication failure; logname= uid=93 euid=93 tty= ruser= rhost= user=user ========================= It works just fine on the old server but not on the new one. I have verified that the user which is considered as unknown can log in to the console just fine, and I tried multiple users. I have found a bug report[1] which suggests that the authentication fails because exim uses its own user-ID to do the authentication. Yet the bug has probably been fixed. [1]: https://bugzilla.redhat.com/show_bug.cgi?id=449256