Incoming DKIM verification corrupts mail headers for mail accounts in Outlook

Created:

2016-12-12 03:48:41 UTC

Modified:

2017-08-17 15:09:28 UTC

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Incoming DKIM verification corrupts mail headers for mail accounts in Outlook

Applicable to:

  • Plesk Onyx for Linux

Note: This article has the reference to the issue with the fix available:

  • #PPPM-5070 "Mail headers of emails retrieved from a Plesk server via Outlook were blank if “DKIM spam protection” was enabled on the server."
    Fixed in:
Please consider updating your server:

Symptoms

In Plesk Onyx mail accounts configured in Outlook have blank subject and the message body contains the full message header.

Courier-IMAP is used on a server.

Cause

This is an internal issue with ID #PPPM-5070 , which is planned to be fixed in future product updates.

Resolution

Use one of the following workarounds:

1. Disable incoming mail verification in DKIM spam protection in Tools & Settings > Mail Server Settings > Verify incoming mail

2. Switch from Courier-IMAP to Dovecot in Tools & Settings > Mail Server Settings > install and use another IMAP/POP3 server > select Dovecot. Note: if any purchased SSL certificates were installed in Courier-IMAP, they should be moved to Dovecot:

# cp /etc/courier-imap/courier.pem  /etc/dovecot/private/ssl-cert-and-key.pem

Otherwise, the default Plesk ones will be used.

For additional information about Dovecot check Plesk Administrator Guide .

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