Firewall should be able to block the IP of the selected country. I have a lot of traffic from the IP 5.10. *. *

Add a function to include Owncloud in Plesk, so administrator can configure for each customer a specific cloud-space.

Add a new Domain/Subdomain-Type "DynDNS", which redirects to a dynamic IP-Address like dyndns.org and similar sites including an api to sync the current ip address through url call.

Support varnish cache.
www.varnish-cache.org

Add Sogo as a webmail alternative in Plesk.

Sogo share your calendars, address books and mails in your community with a completely free and open source solution

Sogo is a great webmail solution and provides native Microsoft ActiveSync support. Mobile devices such as Apple iPhone, Android, Windows Phone, and BlackBerry 10 can fully synchronize emails, contacts, events and tasks with SOGo.

Add HHVM support

It's incredibly annoying that you have to setup a subscription solely for each subdomain that you want to create email addresses for. Please fix this.

Most of RBLS are checking the SMTP Banner and currently only the first domain name is being used. To reduce scamming or to prevent being blacklisted you should apply myhostname with the according domain name.

if you would manage multiple Plesk servers that function very appropriate

At some time you closed the request "fail2ban for IPv6" stating that fail2ban does not support it. That was no doubt correct at the time - but now it does, see https://github.com/fail2ban/fail2ban/tree/0.10

I'm seeing a lot of warnings in the fail2ban log on my dual stack servers, like this:

66:1000:b01c:10ab:0:1: [Errno -9] Address family for hostname not supported

and my log checking software is complaining to me about the overly long fail2ban log.

See also: https://ctrl.blog/entry/fail2ban-ipv6

Thanks! Tim.

Use "Let's encrypt" to secure IMAP/POP/SMTP connections to avoid "non valid certificate" messages with self signed certs.

I'll like to create a hosting that only use Nginx as webserver. Also I'll like to do this with Node.js, but I think it will not be approved.

I suggest you add a feature in Settings with which we can enable SPAM / VIRUS protection for newly created mailboxes by default.

Discussion here:

http://forum.parallels.com/showthread.php?287233-Anti-virus-and-anti-spam-enabled-by-default-on-mailbox-creation&p=715980#post715980

Some of security configuration requires GeoIP detection. It also useful for tracing and should be easy as adding '--with-http-geoip-module' option to configure command for the package.

Many mail servers have this feature. Please include in plesk possibility to add disclaimer to mail footer on specified domain.

Many Clients ask me how to add Disclaimer to mail footer automatically not from webmail.

Allow management of greylist filters and configuration from the Plesk control panel instead of only from command line as is currently the case.

You are currently not able to Alias a subdomain through plesk. Instead you must create the subdomain as a primary if you wish to alias it. In many situations it would make sense from an organizational standpoint to keep the subdomain under a main domain while still adding aliases to it. I do not believe this is a technical restriction of the webservers so it would be helpful if plesk allowed you to add aliases to subdomains.

When I first saw the option of create DBs, I thought it was something like I'm suggesting. MongoDB, MariaDB, CouchDB, etc, etc. This will be super cool. :)

We have many support requests from our customers (non technical) to search logs and find if a message was sucessfull delivered and consume much from our support.

If the customer could search logs from a specific sender ou destination, filtering by date, will be great for us.

I would like to use an E-Mail address as an outgoing E-Mail address with no postbox behind it. All E-Mails should be forwarded to another E-Mail address.
Currently you can set up forwarding but if you check "Use postbox" than the mails will be kept on the server although they have been forwarded. If you uncheck it, it is impossible to send emails from that address.

So please add at least an option to delete mails after forwarding them.