Allow email address, local part to have characters such as $ as per RFC3696 which allows ! # $ % & ‘ * + – / = ? ^ _ ` . { | } ~

My problem is that I have moved my hosting package from eXtend to Plesk, and suddenly I have a bunch of email accounts I cannot re-create.

In Plesk Windows, by default, mailing lists are created with the sender address of moderator instead address of mailing list.

So to fix the issue, and change the address of mailing list to mailing lists address instead moderator address, we need to acess the server via RDP, and change this configuration in MailEnable list settings.

I suggest to implement this feature directly in Plesk control panel.

Plesk does not currently support DNS Whitelists like it does RBLs, such as the list at dnswl.org. There needs to be a way to add this from the Plesk UI.
The Postfix main.cf config directive is permitdnswlclient.
Whenever a Plesk upgrade happens, the setting, if added is removed and needs to be added back manually.

Use case: One of our customer has uploaded files to his ftp server in a public internet cafe and his password was stolen. Afterwards there was a mass spam mail sending script on his webserver. Our server has been landed in black lists. It was very difficult to find and correct it.

Hello,
I miss the functionality of managing a blacklist of target email addresses in case you have a catchall email domain.
In most cases, the originator address of spam emails changes every time, but the target address is frequently used.
So with this functionality, I could drop out invalid recipient addresses, without giving up the setup to use catchall all emails <everything>@your-domain.
This is useful to register webshops or community everytime using a separate target email address to distinguish incoming email if they are valid or not.

Implement push notifications to iOS devices from mail server.

Here are details of what I mean: using a patched version of Dovecot and a small Perl script, it's possible to get native Apple push notifications for new mail using the stock iOS mail client. This is accomplished by mimicking Apple's XAPPLEPUSHSERVICE IMAP extension for Dovecot used in macOS Server, whose source code is published on the Apple Open Source website. See more details here: http://bit.ly/2H8NERJ

By default use an existing email created by default as a return path . Return path should be configured in mail tab instead of solution from here:
https://support.plesk.com/hc/en-us/articles/115000419013-What-is-the-return-path-sender-in-PHP-mail-scripts-and-how-to-change-it-

It would be really nice, if you can ad a autoresponder funktion with additional features like

-startdate
-Timefunktion (start at 8.00 or finish 17.00 h)
-repeat function (example: every monday and tuesday)
-activation per app
-html in content area

Thanks

Add a feature that allows the configuration of Postfix relay to Exchange for a specific domain.

For example, all outgoing emails from @example.com are relayed to an Exchange/Office 365 server.

Please add functionality to access webmail from Plesk interface without using a password.
The same functionality is enabled in cPanel. Please see section "Access webmail from the cPanel interface" of documentation:
https://documentation.cpanel.net/display/CKB/How+to+Log+in+to+Your+Server+or+Account#HowtoLogintoYourServerorAccount-AccessWebmaildirectly

Right now spf hook checks incoming mail for all domains if it is enabled in Tools & Settings > Mail Server Settings.
There is no simple way to disable it for some domains/subscriptions that may not need it present.

It's required to send Plesk notifications using external Mail server at the same time keep local mail server(postfix) working for domains.

procmail is a very flexible mail filter and processing tool and it is a shame that it is not integrated within plesk.
I need it to do some mail autoprocessing depending on subject and sender.
I am surprised that even with plesk 17 it is not already available.

Mail authentication brute force attacks generate additional traffic.
It is counted as a part of POP3/IMAP traffic statistics in Plesk for Windows.
Please add functionality to recognize and ignore such normal traffic so that it does not forge POP3/IMAP statistics.

Currently Plesk Mail certificate only secure POP/SMTP and IMAP connections, would like a feature to encrypt outgoing messages itself.

It will be better if plesk Outgoing Mail Control shows email instead of domain name.

Allow a@example.com only to send mail to example.com