May 25th 2021 #1 Hi, I would like to log Usernames of failed SASL Authentications.I tried to change the log_level to 6 in smtpd.conf of Postfix and Courier. Also I added the "-v" in master.cf after smptd. The Log file got bigger but not on auth failed lines.
Jun 17th 2021 #2 Maybe you can try enable logging in dovecot - sasl uses dovecot to validate user and pw. /J