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Resolved MU #14 libopendkim update breaking POP3 downloaded mail headers

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PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE
Onyx, #14, CentOS 7.3, 64-Bit

PROBLEM DESCRIPTION
The update that solved the libopendkim yum install issue is causing a severe new issue with mail headers. When a mail is downloaded by POP3, the header is distorted, so that the header and content of mails are both displayed as "body" text, starting with this line:
dkim=none (not signed) [email protected]
The issue does not exist, when the mailbox is accessed by IMAP.

STEPS TO REPRODUCE
Send a mail into any mailbox. Download that mail using POP3.

ACTUAL RESULT
Mail distorted, showing header as described above and body in the body field.

EXPECTED RESULT
Correct mail format.

ANY ADDITIONAL INFORMATION
Workaround: Disable "Verify incoming mail" in DKIM spam protection in Mailserver Settings.
 
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