LinuxQuestions.org - Postfix w/ sasl isn't prompting for password

Hello, LQ. Here's a little bit of background for the issue I'm having.

One of my clients has some proprietary software for sending out e-mails. I'm not sure what it does exactly, I just know they needed an SMTP server. This application runs on a separate server from the SMTP server, both of which are on the same 192.168.x.x subnet.

I setup Postfix for them without any authentication and it works fine. I can send e-mails to myself from both the localhost and remotely. However, this mail application of theirs doesn't work (for security reasons I'm guessing) if the server has no authentication. So, they asked me to give them a username and password.

Now, even though I've enabled sasl authentication in main.cf and I've followed a few guides, whenever I send mail, I'm never prompted for a login or password. It just goes straight through. Here's some of my configuration options:

Code:

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)

smtpd_sasl_auth_enable = yes

smtpd_sasl_local_domain = $mydomain

smtpd_sasl_security_options = noanonymous

smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem

smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key

smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache

smtpd_use_tls = yes

and smtpd.conf

Code:

pwcheck_method: saslauthd

auxprop_plugin: sasldb

saslauthd_path: /var/run/saslauthd/mux

mech_list: PLAIN LOGIN

Here's an excerpt from a telnet session:

Code:

220 smtp.example.com ESMTP Postfix (Debian/GNU)

EHLO localhost

250-smtp.example.com

250-PIPELINING

250-SIZE 10240000

250-VRFY

250-ETRN

250-STARTTLS

250-AUTH LOGIN PLAIN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

AUTH PLAIN dGF4dmVyAHRheHZlcgB0YXh2ZXI=

535 5.7.0 Error: authentication failed: generic failure

I've never messed with Postfix, so I'm at a complete loss as to why this isn't working. Any help is greatly appreciated. :)