New answers tagged sasl
The solution that worked for me was to change smtpd_sasl_type = cyrus to smtpd_sasl_type = dovecot and make sure dovecot-imapd is installed.
I had this error symptom when migrating from Ubuntu 10.04 to 14.04. Once I changed smtpd_sasl_type from cyrus to dovecot it worked. You have to restart the postfix service after the change.
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