- Plesk Onyx for Linux
Roundcube webmail is not accessible after an upgrade to Plesk Onyx 17.8 on CentOS 6. The following error message is shown in a browser:
PLESK_INFO: Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
The following message appears in the logfile /var/log/plesk-roundcube/errors:
CONFIG_TEXT: IMAP Error: Login failed for email@example.com from 203.0.113.2(X-Real-IP: 203.0.113.2,X-Forwarded-For: 203.0.113.2). Empty startup greeting (localhost:993) in /usr/share/psa-roundcube/program/lib/Roundcube/rcube_imap.php on line 196 (POST /roundcube/?_task=login&_action=login)
The Roundcube version is 1.3:
# rpm -qa | grep round
The system PHP version is 5.3:
# php -v
PHP 5.3.3 (cli) (built: Mar 22 2017 12:27:09)
Horde webmail works fine.
According to Rouncube requipments, Roundcube version 1.3 requires PHP version 5.4 or greater.
Upgrade to Plesk Obsidian.
Change PHP version for webmail using the steps from this KB article: