Replace the default "Authentication failed" reply with PAM's failure.
This option is exclusive to Dovecot 2.4.
See https://doc.dovecot.org/latest/core/summaries/settings.html#passdb_pam_failure_show_msg.
Declarations
Type
null or booleanDefault
if isPre24 then null else config.services.dovecot2.showPAMFailure