Tool for validating sender address as spam-fighting technique?
LConrad at Go2France.com
Sun Mar 11 19:56:23 UTC 2007
>Perhaps we are talking about different things, I am talking about
>systems which send me an email back requiring me to do steps a, b or c
>in order to complete delivery of the email.
that's challenge/response, which has been widely discredited for years.
SAV is a receiving MX probing the MX of sender at domain.tld for
verification of sender as known recipient.
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