Would you mind to try Nginx caching in Plesk Onyx 17.8 Preview?
This would be very helpful to get your experienced feedback here http://www.surveygizmo.com/s3/4165754/Plesk-17-8-Preview
Since Plesk Obsidian RC4, users’ Microsoft Outlook and Thunderbird mail clients can now be automatically configured based on entered emails.
Now that you implemented the ability to use domain specific security certificates for individual mail domain (thank you a lot for this!), the next logical step would be to implement autodiscover/autoconfig.
It's much important then server replication and other things.
Thank you for your input! We will consider this functionality in upcoming releases if it will be popular.
Everyone, please continue voting for this feature if you consider it important.