So I know this was submitted before, and personally I'm not a fan of greylisting to begin with, but I have others that want it.

Old Thread: https://portal.smartertools.com/community/a87031/amend-greylisting-implementation-to-handle-smtp-clusters.aspx

Just wondering on the status of this?  I've already started writing a PowerShell script to get ip4/ip6 blocks, and planning on automating SOAP calls, but hitting a few snags having to deal with nslookup.exe and multiline answers.  If you don't think you'll add it, I'll continue working.