Implement support of SPF, DMARC and DKIM anti-spam methods for Plesk email notifications
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.

Thank you for your input! We will consider this functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important.
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Plesk Tech Support commented
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.