Computer Mail Services, Inc.
Software / Services / eMail Tools: IP Address Blocking, Spam Filtering, Log Data Mining and DNS Blacklist Monitoring

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Request Reverse NDR Check

Go to RNDR Main

CMS has the capability to test the vulnerability of your domain to "Reverse Non-Delivery Return" (RNDR) attacks.

But first CMS must verify that the request to check a domain for RNDR vulnerability is valid and not the result of a "prank" or otherwise improper action.

	What will you see when CMS initiates a Reverse NDR check?
	IF YOU ARE VULNERABLE...
	IF YOU ARE NOT VULNERABLE...

Steps to initiate RNDR vulnerability check...

1)	Complete the form below and select "Initiate RNDR check request"
2)	Upon receipt, CMS returns a confirmation request to the designated email address
3)	The email recipient verifies their "Request for NDR check"
4)	CMS runs the Reverse NDR check
	The domain of this email address will be checked for RNDR vulnerability
	Email address:		Note: This must be a valid email address for the RNDR test to work.

	Telephone (optional):
	Name (optional):
		Why enter a name and telephone number? During severe RNDR attacks, email becomes slow and often inactive. If CMS finds you vulnerable to RNDR attack, we will also contact you by telephone to verify your test results.

Other Actions

Go to CMS Main Go to Praetor Main Go to RNDR Main

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