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Loop for SMTP Reverse Banner Check DNS Resolution

Common errors:

 Loop detected! We were referred back to

 Too many delegations to other servers. Probably a loop.



 Verify that your reverse DNS is setup properly.

 Verify that your IP provider has given you full IP delegation. (in some instances you need to specify that you want full reverse delegation as some providers will still route through their own DNS first causing errors for some reverse DNS methods.)



Using a SSL Certificate for RDP

Create and install a certificate using IIS or import a pfx file, the cert can be SHA256 or whatever you want.

Open your Cert Manager,

  • Run/open "MMC"
  • File, Add/Remove Snap-in, Certificates, OK
  • Expand the folder with your cert (generally Personal, Certificates)
  • Right Click the Certificate, Open
  • Details tab, near the bottom choose thumbprint and select the HASH VALUE
  • remove the spaces from the HASHVALUE
  • open a Command Prompt with elevated privileges
  • run the following command using your SSL cert's thumbprint hash value in place of "HASHVALUE" remove the quotes.
    • wmic /namespace:\\root\cimv2\TerminalServices PATH Win32_TSGeneralSetting Set SSLCertificateSHA1Hash="HASHVALUE"
  • It should say "Updating property(s) of ...
  • then it should say .. update successful

That's it, you're done.