You may get the mail configuration error when accessing the webmail client.
Here is the solution:
Login to SSH as root
chmod 644 /etc/roundcubemail/config.inc.php
reboot
VestaCP – Webmail Configuration Error CentOS 6
About the Author: Feat Out
Feat Out is the founder of "Feat Out Media Inc." and head of author at featout.com. His name is Bilal, a freelancer and SysAdmin of several Linux platform. He is looking to help others and eager to learn things online...
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