I reported this via a Plesk support ticket in August and was advised the following:
Passing this response or similar for multiple PCI scans seem to appease SecutiryMetrics in each instance.
That's very odd considering their reason for failure was the version no longer being supported. Are you thinking SM decided to pass it because they're satisfied that Parallels is patching the 3.0.8 version even though the Courier author has abandoned it?