# Turn on debug mode in Roundcube webmail

Please follow the tutorial to find Roundcube config file (`config/config.inc.php`) first: Locations of configuration and log files of major components

Then add settings below in `config/config.inc.php`:

    // system error reporting, sum of: 1 = log; 4 = show
    $config['debug_level'] = 4;

    // Log SQL queries
    $config['sql_debug'] = true;

    // Log IMAP conversation
    $config['imap_debug'] = true;

    // Log LDAP conversation
    $config['ldap_debug'] = true;

    // Log SMTP conversation
    $config['smtp_debug'] = true;

No need to restart web service.

Roundcube is configured (by iRedMail) to log to Postfix log file, it's `/var/log/maillog` or `/var/log/mail.log`.