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Forwarded to devs email security extension causes double header in system notification mails > non-delivery

TomBoB

Regular Pleskian
User name: TomBoB

TITLE

email security extension causes double header in system notification mails > non-delivery

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE

CentOS Linux 7.7.1908 (Core)‬
Product Plesk Obsidian
Version 18.0.23 Update #3

PROBLEM DESCRIPTION

Plesk sends certain system notifications out to customers, depending on settings under tools & settings, notification.
Since enabling email security, those mails are not being delivered, but bounce back with an error message:

subject:
Undeliverable mail, invalid header section

This nondelivery report was generated by the program amavisd-new at host
our.server.com. Our internal reference code for your message is
15388-09/f9AGCSgpwXjh

INVALID HEADER

Duplicate header field: "Content-Type"

Return-Path: <[email protected]> (OK)
From: Server Admin <[email protected]> (dkim:AUTHOR)
Message-ID: <[email protected]>
X-Mailer: =?UTF-8?Q?PHP/7.3.13?=
Subject: Application Updates.

STEPS TO REPRODUCE

enable a few notifications to customers. Wait for the notifications to be sent.
for example: application updates, or lets encypt can't issue, or the like.

ACTUAL RESULT

mail can't be delivered but bounces back. see above

EXPECTED RESULT

notification mail is being delivered.

ANY ADDITIONAL INFORMATION

unlike how it should have been done (remove magicspam first), email security was installed first, than magicspam was removed. the magicspam version was a leftover free version rom the Onyx days.
in case it helps pin down the cause of the issue.

YOUR EXPECTATIONS FROM PLESK SERVICE TEAM

Help with sorting out
 
Thank you for the report.
This is a known internal bug and will be fixed in the core, PPP-47382.
 
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