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libray's activity in the archive.
There is at least one problem to address when sending NDR during the smtp conversation; Dictionary attacks. By verifying the user exists or not during this phase allows ratware to generate addresses and validate clean ones on the fly.
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There is at least one problem to address when sending NDR during the smtp conversation; Dictionary attacks. By verifying the user exists or not during this phase allows ratware to generate addresses and validate clean ones on the fly.