Hi please update roundcube to version latest 1.5.1!
Thanks!

Plesk email notifications to the administrator's email address get into Spam folder at public email providers because they are not protected by SPF, DMARC or DKIM anti-spam methods.

It is required to enhance the Plesk notification system so that Plesk email notifications are treated as legitimate email messages by the Internet email system.

Allow users to export and import anti-SPAM mail filters via the UI.

Add more detailed statistics in Plesk Email Security such as:

• List incoming spam messages with their date and from which IP they came.
• List outgoing spam messages with their date and from which subscription/domain they came.

I need to restrict some email addresses to send emails to specific domains. For example, x@test.com should only be able to send emails to y@mydomain.com and z@yourdomain.com but x@test.com shouldn't be able to send emails to any domain other than these two. In other words, an email from x@test.com shouldn't go to ab@test2.com

It is necessary to have cli utility to get outgoing mail limit statistics for previous days, to see mailboxes that tried to exceed their limitation and when.
I want to monitor that with an Script and Cronjob and maybe make some auto actions on that.

put a "Test" verification button to test the settings of External SMTP Server

Allow outgoing mail limit to be based on unique recipients and not by message count.

I use Plesk for mail server if it could be cluster for 2 server redundancy it is really perfect.

Currently, when mail service is disabled for domain the DKIM signature is not working.

It should be able to disable mailservices for specific domains (because 3rd party mail service like gmail, microsoft's exchange online etc. is used), while messages
sent by web application (php mail() function) should still have a valid DKIM signature.

It is required to add ability to sign DKIM when Mail service is disabled for domain

We need Mail Log Browser for windows Server, this extension is only available for linux, those of us who use windows are left behind.

Plesk allows to create email without a mailbox when the limit for the mailboxes is exceeded, but the mention regarding the "Mailbox - Off" is not always obvious for the customer and might be missed, allowing him to believe that the mailbox is created and trying to log into it, eventually getting banned by fail2ban.
A more noticeable notification regarding might be useful.

It would be useful to test mail sending with DKIM d8uring migration on destination server before switching DNS zones.

There is a way to clean mail queue with command like the following:

plesk bin mailserver --help | grep queue
--clean-mail-queue Removes all the messages from the mail
queue.

But sometimes it is required to clear not all messages but only ones that have the same subject, sender, recipient, etc.
In Plesk GUI there is already this functionality in Tools & Settings > Mail queue, opening search bar with arrow icon.
It would be great to have the similar functionality for CLI command.

Would be nice to be able to add custom directories for the spam assassin's learning daily task

Add a setting to disable mail forwarding to certain domains in Panel for global configuration so that on user side wont be allowed to put the certain domains in the Forwarding Email in the Plesk Panel. Thank you.

Possibility to edit the DKIM popup message which contains the TXT records that need be added on external DNS server.

https://docs.plesk.com/en-US/obsidian/customer-guide/mail-settings/enabling-dkim-email-signing.74718/
3rd step.

Mail autodiscover in Plesk Obsidian does not support the latest Outlook version 2019 and O365.
Developing support to Microsoft proxy servers for autodiscover requests is required.

Configure plesk premium email in order to manage from a single account several emails from different websites as it can be done with outlook or thunderbird