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.

It would be great to have an option to set limit outgoing email per day, not only per hour.

ability to move mailing list from one domain to another domain in Plesk

Make Plesk webmail capable of reading/decompressing ZStandard-compressed mail files.

Would be very helpful if we could edit the email queue for subscriptions without server-wide admin rights. Unfortunately, as a Plesk user, I cannot edit the email queue in my subscription.

Add mail autodiscover functionality for iOS/OS & android mail clients please.

Would be good to be able to manage SMTPUFT8 option over Plesk so that it is not reverted after Plesk Updates and also to remove the need to manage this option over the Postfix config directly.

More information:
https://talk.plesk.com/threads/smtputf8-is-required-but-was-not-offered-by-host.351377/
http://www.postfix.org/SMTPUTF8_README.html

At the moment "auto discover functionality for email" in plesk is supported, but you can hardly call it "supported". Come on plesk team!

• Outlook: barely supported, mostly isn't working
• Thunderbird: supported, but not 100% (for example the outgoing server port I have configured as 587 in the SRV record is not applied)
• Mac OS or iOS: not supported
• other mail clients apps: barely supported

Please improve this functionality significant so plesk can correctly call this "supported".

Ability to use MySQL as an extension to Dovecot
Business case: using MySQL database for centralized authentication to email accounts.

Mailgroups currently simply forward mail to all its members. When forwarding, spam rules do not apply. Hence the black/whitelist settings are also ignored.

At least we should be able to only allow mailgroups to be used from internal accounts, so that mailgroups are not an easy target for spammers.

We would appreciate it if the setting of the time were included in addition to the days for the «automatic replies» by e-mail. For part-time employees, this attitude would be a real asset.

In Courier IMAP with qmail, when the mailbox exceeds usage limit, mails for this mailbox get bounced. Bounced mails are not displayed in Plesk panel and can be checked only on the server side. And in this case, mails queues from Plesk and server are different which can be confusing.
Therefore, it would be convenience to have a feature that can manage and remove the bounced mails from the Plesk UI.

An option to customize outgoing SMTP port.
Both for SMTP relay and direct SMTP.
Currently there's only a temporary workaround for Google Cloud VMs with Plesk.
This configuration might be overwritten by an update:
https://support.plesk.com/hc/en-us/articles/115004060494

It would be useful to scan mailboxes for spam retroactively. This would allow searching previous emails for spam after setting up spam protection. This could also help flag items that passed the filter before the sender got blacklisted.

For instance:
https://serverfault.com/questions/680890/automatically-rescan-email-with-spamassassin-after-it-has-been-received

It would be nice to be able to set the IP address used to send mails as the domain's IP, the same way it happens on Plesk for Linux.

When there is a SmarterMail service running on the same server with Plesk, it would be great to have an option to create an account in Plesk with the same domain and attach the SmarterMail content.