I'd be happy if you could integrate multiple MySQL Versions into Plesk. Each Customer should be able to choose his MySQL. Also choosing more than only one version should be implemented.

I'm not sure if any webmail option right now allows the email user to update their out of office / auto response message. I think the email user has to login to Plesk to be able to edit that right now (which is annoying).

Anyone have any suggestion on this?

There is relatively new anti-spam tool - Rspamd. I think, it worth to be integrated with Plesk as an alternative to SpamAssassin. It shows better performance as the author says here http://rspamd.com/misc/2016/03/03/rspamd-performance.html

Add two-factor-auth for YubiKey.

Actually it's possible to show deferred messages headers in : Tools and settings > mail server settings > mail queue

It would be very useful if it's possible to show the reason why the message is deffered or stuck in the queue (/var/spool/postfix/defer).

Being able to modify the subject in notification emails.

It'd be awesome if we can get support for powerdns support instead of bind9.

I want to be able to set the recipient_delimiter. But, currently, any customizations to main.cf get overwritten.

It would be much better if server-wide and per-mailbox options were available in Plesk to add SpamAssassin rules.

SpamAssassin can be configured by the command line, but this is difficult for many of us.

Please add PHP Composer to chrooted Environments.
Many Customers Need PHP Composer to install various scripts, cms Systems and libaries.

A current big Problem is the new typo-neos System - you must use Composer to install at sources correctly

A other Problem are PHP API's and Libaries like Payment Companies like PAYMILL etc..

as brotli seams to be a up to 20% better comression library than gzip and used by many CDN Providers it should be possible to switch on in plesk.

please add feature to give SSL certificates to domains with the hosting typ forwarding

imagine you get a domain with thousands of dns records and you have to create each by your self in plesk!!!

The new security option for plesk 12 is Fail2Ban, but it is only for Linux version.

There is an opensorce for windows.

http://www.digitalruby.com/securing-...icated-server/

I suggest to Parallels Team include this.

It is not possible to add an ip manually to fail2ban trough Plesk interface. Sometimes you detect an offending ip address which you want to ban from your system, before it is detected by recidive rule.

There is an spam filtering option to "Move to spam folder XXXX" on Linux, but not on Windows (Plesk 11+).

Unfortunately, horde doesn't work so well and every time when a message with broken header arrives, horde displays "Invalid Address" and no subject to all inbox messages. The described fix in https://kb.plesk.com/en/121175 doesn't work in this cases, forcing us to find the broken message manually (or scripting something to do the dirty job).

This feature should exists in Windows env as in Linux.