Challenge-Response Risks

Challenge-Response risk check

The service tests if a mail address belongs to a domain that uses Challenge-Response as an anit-spam mechanism.

Syntax …/svc/2.0/address/crrisk/<address>
Example …/svc/2.0/address/crrisk/
Parameter An ASCII email address as last part of the URL




{"result": 1}
  • result: the evaluation result
    • 0: there is no CR risk for this address/domain
    • 1: there is a CR risk for this address/domain


The domain of the requests address is checked against the crrisk database table. If a match is found a positive result (1) is returned.

Each execution of the check will be documented as a business event (database table business_event) with type 114.