Turn on debug mode in Dovecot

To turn on debug mode in Dovecot, please update below parameter in Dovecot config file dovecot.conf:

• on Linux and OpenBSD, it's /etc/dovecot/dovecot.conf
• on FreeBSD, it's /usr/local/etc/dovecot/dovecot.conf

mail_debug = yes

Restart Dovecot service.

Dovecot is configured to log into 3 log files:

• /var/log/dovecot.log: main log file.
• /var/log/dovecot-sieve.log: sieve related log.
• /var/log/dovecot-lmtp.log: lmtp related log. NOTE: old iRedMail release doesn't have this file.

If you need authentication and password related debug message, turn on related settings and restart dovecot service.

auth_verbose = yes
auth_debug = yes
auth_debug_passwords = yes
auth_verbose_passwords = yes

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