Hi,
I'm struggling to resolve this issue, and the weird thing is I couldn't find any error message in /var/log/maillog, /var/log/httpd and /var/log/plesk-roundcube/errors.
I'm using roundcube 1.3.6 that comes with Plesk Onyx Version 17.8.11 & CentOS 6.10.
I've tried these settings in /usr/share/psa-roundcube/config/main.inc.php.
$rcmail_config['debug_level'] = 4; // tried 1, 4 and 8
$rcmail_config['smtp_log'] = true;
$rcmail_config['log_logins'] = true;
$rcmail_config['log_session'] = true;
$rcmail_config['sql_debug'] = true;
$rcmail_config['imap_debug'] = true;
$rcmail_config['ldap_debug'] = true;
$rcmail_config['smtp_debug'] = true;
$rcmail_config['enable_spellcheck'] = false;
$rcmail_config['smtp_port'] = 587; // tried 587 and 25 (default)
But couldn't find any error message...
Greatly appreciate if you can point me to the right direction.
Much thanks again.
John Low