How to enable debug logging for Roundcube webmail on Plesk for Linux?

Question

How to enable debug logging for Roundcube webmail on Plesk for Linux?

Answer

1. Log into the server via SSH.

2. Using the vi text editor open the/usr/share/psa-roundcube/config/config.inc.php file.

3. Add the values below and save changes:

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

   // 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;

   Note: In case the $config['debug_level'] option is set to 4, the errors will be displayed in Roundcube GUI, and not in /var/log/plesk-roundcube/errors log file.