Unable to turn on DKIM with SmarterMail

Symptoms

DKIM support cannot be enabled in Plesk 17.0:

• Enabling the option DKIM spam protection at Tools & settings > Mail server settings returns the following error:
  

  sfdk_server_wide_sign_failed

• Enabling Use DKIM spam protection system to sign outgoing email messages at Domains > example.com > Mail settings returns the following error:
  

  SOAP ERROR: GenerateDKIMCert(server.example.com, 1024, default) failed: Error code 0x803d0013. Error message: The body of the received message contained a fault. Fault reason: Unable to handle request. The action 'http://tempuri.org/GenerateDKIMCert' was not recognized.
     at (WebService::Error::checkResult line 103)
     at generateDKIMKeyPair(default, 1024)(SmarterMail::Common::Domain::generateDKIMKeyPair line 208)
     at execute console command --generate-domain-dkim-key-pair(vconsoleapp::start line 122)
     at execute mailmng.exe --generate-domain-dkim-key-pair "--domain-name=server.example.com"(vconsoleapp::run line 139)
  C:\Program Files (x86)\Parallels\Plesk\admin\bin>mailmng.exe --generate-domain-dkim-key-pair --domain-name=server.example.com

• Corresponding DNS records for DKIM are not created under Domains > example.com > DNS settings .

The error appears during Plesk upgrade to 17.0 version:

Cause

This is Plesk bug with ID #PPPM-5812 which has been fixed in Plesk Onyx 17.5.

Resolution

Upgrade to the latest stable available Plesk version.

As a workaround for Plesk 17.0, upgrade SmarterMail to 15.x version.