Rouncube, out of office feature, autoresponder emails, bounce, due to not authenticated email

Symptoms

In Roundcube when Out of Office is used under settings the autoreponder is rejected by mail providers.

Description

Roundcube doesn't send emails as an authenticated user and causes autorespnder emails to be rejected by mail providers.

We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-51591. Follow this article to receive an email notification when a solution is published in the product. 

Workaround

Currently there is none.