Specifying a Framework
The SASL library uses a separate configuration file for each application it works with. Postfix uses a file named smtpd.conf for SASL purposes. This file is usually located at /usr/local/lib/sasl2/smtpd.conf. At a minimum, smtpd.conf contains a line indicating the framework to use. We are going to look at specifying either Unix passwords or separate SASL passwords for Postfix authentication. See the Cyrus documentation to see other options you might include in smtpd.conf.