How to disable mail delivery reports sent from a Plesk mail server?

Question

Mail delivery reports are received from a Plesk mail server if an email was sent from Outlook or Thunderbird:

PLESK_INFO: Delivery Status Notification

This message was created automatically by SMTP2Go.

----- The following addresses had successful delivery notifications -----

jdoe@example.com (relayed to non-DSN-aware mailer)
Reporting-MTA: dns; mail.example.com
Original-Recipient: rfc822; jdoe@example.com
Action: delivered
Final-Recipient: rfc822; jdoe@example.com
Status: 2.0.0
Remote-MTA: dns; mail.example.net
Diagnostic-Code: smtp; 250 Ok

PLESK_INFO: Mail Delivery System <MAILER-DAEMON@plesk.server.com>
This is the mail system at host plesk.server.com.
<jdoe@recipent.com>: delivery via
some.mail.relay.com[203.0.113.2]:25: 250 2.0.0 2f1h289tms-1
Message accepted for delivery

How to disable them?

Answer

A delivery receipt confirms that an email was received by a recipient. Mail delivery reports are not generated by Plesk, but by mail clients like Outlook, Thunderbird, etc on a response from the recipient's mail server.

Disable mail delivery receipts in the mail client's settings:

• Add and request read receipts and delivery notifications - Outlook
• How to permanently request a "Delivery Status notification" | Thunderbird Support Forum | Mozilla Support