ConfigurePostfixTo

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This IS incomplete... it's from memory and referencing a working system.

saslauthd needs to be configured first.

Then, to configure postfix to use that for SMTP AUTH add:

/etc/postfix/sasl/smtpd.conf

containing:

pwcheck_method: saslauthd
mech_list: PLAIN LOGIN

In /etc/postfix/main.cf make sure you have "permit_sasl_authenticated" somewhere in the restrictions before the hard reject. Also make sure the last four lines listed here are somewhere in main.cf.

smtpd_recipient_restrictions =  reject_invalid_hostname,
                                reject_unknown_sender_domain,
                                reject_unknown_recipient_domain,
                                permit_mynetworks,
                                permit_sasl_authenticated,
                                reject_unauth_destination,
(...)
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain =
broken_sasl_auth_clients = yes