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Edwards says the bounce-back verification technology is based on a proposed IETF standard called Bounce Address Tag Validation.
Gartner analyst Peter Firstbrook says IronPort is the first vendor to implement this specific bounce-back-validation technology,
but other vendors attempt to deal with the problem in their own ways. Firstbrook adds that the most likely targets of a bounce-back-related
DoS attack are large companies with well-known brands.
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