Currently, there is no way to permanently change the MSMTP config in /etc/msmtprc and the Plesk options in "Mail > External SMTP Server" are not enough for Gmail and Zoho to even work.

Gmail problem:
While sending you get
errormsg='the server sent an empty reply'
Fix: add "tls_starttls off" to /etc/msmtprc
Zoho problem:
https://talk.plesk.com/threads/its-not-possible-to-send-notification-emails-from-plesk-using-and-external-smtp-msmtp.344922/#post-836533

Please provide for us a way to change the config template or include additional configs, like we have for e.g. proftpd in /etc/proftpd.d/

Related suggestions:
https://plesk.uservoice.com/forums/184549-feature-suggestions/suggestions/17680498-msmtp-change-sender

The DMARC support in Plesk Onyx 17.5.3 ist incomplete. If an incoming email is rejected due to a DMARC fail there is no mailer daemon generated to inform the sender of this email.

Please add this important feature to DMARC support. Otherwise it would not be usable for most customers.

https://github.com/sys4/automx

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.

Don't send auto responder to adresses with "noreply" or "no-reply"

Configure a mail user to send mail only to other addresses in the same domain. And not to external addresses.

Dovecot shipped with Plesk should support Full Text Search. It is critical in case of large mailboxes ~1Tb

i tried tricking dovecot adding this :
local domain.tld {
protocol imap {
sslcert = </opt/psa/var/modules/letsencrypt/etc/live/domain.tld/fullchain.pem
sslkey = </opt/psa/var/modules/letsencrypt/etc/live/domain.tld/privkey.pem
}
}
it worked, for Imap !

but trying the equivalent on postfix, didn't work for smtp
-o smtpdtlskeyfile=/opt/psa/var/modules/letsencrypt/etc/live/domain.tld/privkey.pem -o smtpdtlscertfile=/opt/psa/var/modules/letsencrypt/etc/live/domain.tld/fullchain.pem

Plesk automatically creates mail.domain.tld on DNS, and if you see information about how to log to the email: it says connect on domain.tld
but it throws a warning about the original ssl certificate.

It could be so good if everything were automatic, the Plesk way :)

Details: In individual mailbox, there should be an option (checkbox) to delete spam by SpamAssassin.

Details: SA should filter forwarded spam emails just after they delivered to the end-point mailbox and block the sender of spam messages.

"JMAP is intended to be a new standard for email clients to connect to mail stores. It therefore intends to primarily replace IMAP + SMTP submission. It is also designed to be more generic such that it can be extended with contacts, calendars in the future (replacing CardDAV/CalDAV)." (http://jmap.io/)

Sounds good to have it ASAP it is released.

I want to change the number of days an email is deleted from the spam folder, but there is no way to do it.

Like "postmaster@" i want a email "abuse@" to be autogenerated and forwarded to the main email-adress

Add GUI for email greylisting per email account in Plesk Onyx. Also add a 'Detection Only' mode to allow a testing period, similar to spam filters and mod_security.

Hi Plesk Team,

we are facing problem with mail message size, server-wide message size is ok, but what about domain-wide means,if I want to set for particular mail id messaging size( attachment size) is 6MB than 5 MB of server-wide.is it work or not? Please fix this.

Add a Tag for the notification emails for the Public IP address of a server. If a server is using NAT when the <ip> Tag is used it shows the Private IP address in the Site Notification emails instead of the Public IP address.

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

With option to disable or enable.

Can be installed manually but all guide are now old and nothing for Onyx.

This worked really well for me on 12.5.