After a considerable amount of research, I have configured my postfix server to use dovecot to accept SMTPS connections over port 465 and everything works swimmingly.

Unfortunately, I forgot that, unless I listen to port 25, I'm not going to receive any e-mail from the net.

I'm hoping somebody knows off the top of their head how to open up port 25 on Postfix for anonymous users, but disallow relaying and any other bad things on that port. And to leave the port 465 the way it is.

As to my current configuration, I changed the master.cf file:

smtps      inet  n       -       n       -       -       smtpd

and the main.cf file:

# Use our SSL certificates
smtpd_tls_cert_file = .....cer
smtpd_tls_key_file = .....key
smtpd_tls_security_level = may

# Use Dovecot for SASL authentication
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination

Any help is appreciated!