Hello,

Please add the possibility to purchase an extended license for mail servers with Plesk.

It would be helpful if I prefer to separate my mail services from my main hosting.

Implement feature to configure mails sent to domain hosted in Plesk be delivered to external mailserver if mailbox does not exist in Plesk.

When DKIM is activated, the key isn't added when you use the PHP mail() function, for example if you have a contact form on the website. Please add because this generates false SPAM-detection problems. Google for example thinks it's strange that sometimes the DKIM key is added and sometimes not. Please keep in mind that this should work with an external DNS-service too.

Include Horde webmailer's internal data in backups done with Plesk Backup Manager

instead of the messages being rejected and receiving the error “Transaction failed. The server response was: 5.7.0 Your message could not be sent. The limit on the number of allowed outgoing messages was exceeded. Try again later” to get the server to try deliver the emails at a later time. maintaining it in a queue.

Currently the only way to get the DKIM key is to decode the private key from the shell when using an external DNS service, however it would be nice if the public key is just being displayed in the web interface so the user can see it and add it to the external DNS.

The ability to use nginx as mail proxy.

For example, as Postfix does not support SNI, such feature would be useful

https://docs.nginx.com/nginx/admin-guide/mail-proxy/mail-proxy/

The antispam filter could accept more than 100 addresses

As general management improvement, it would be nice to add feature, when Plesk admin is notified in case of f mailing list password change by Customer or Reseller

Please add functionality to configure redirection of single domain webmail.example.com to another URL

Currently, it is possible to apply it using the workaround:

https://support.plesk.com/hc/en-us/articles/360003509474-How-to-redirect-single-domain-webmail-example-com-to-another-URL

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

Currently, it is possible to create hourly limits for outgoing mail.
It will be useful to be able to configure it for other timeframes, such as Monthly outgoing mail limits.

Hi!
It would be great if the autoresponder may switch on for a whole domain

Could you please add support for dovecots subaddressing feature?

Some mails could not be received due to the fact the Postfix 2.8 and higher in Plesk uses only TLS encryption, when senders use other encryption methods. Manually updating main.cf directly on the server (as discribed in https://plesk.zendesk.com/hc/en-us/articles/213386889) is not always an option since the main Postfix configuration file may be overwritten by any Plesk update. In order to avoid potential issues with non-delivered mails it is required to make SSL/TLS encryption on port 587 optional, not mandatory.

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.

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.

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

Implement Dovecot LMTP.
Currently LDA is used for mail local delivery.
LMTP has a better performance and using it allows to avoid "Inotify instance limit for user (UID popuser) exceeded, disabling. Increase /proc/sys/fs/inotify/maxuserinstances" issues.

https://workaround.org/ispmail/jessie/postfix-dovecot

Horde already supports GPG encryption and key management. It would increase mail security a lot if it could be configured from plesk.