On Dec 30, Josip Rodin <joy@entuzijast.net> wrote: > Um, that happens if your domain is used in spam to so many different mail > servers and with so many various local parts (so as to avoid caching), > and all that are three-verb SMTP conversations. TBH I've never actually This happens often indeed. > heard of anyone getting DDoS'ed by sender verification attempts, so > I can't really imagine that this is terribly likely to happen. I did. > Besides, in the core, it's silly to call the idea antisocial just because > it can be used in a DDoS. Heck, TCP SYN can be used in a DDoS, and any higher > protocol too, but that doesn't mean they're antisocial, only that they are > prone to abuse by antisocial people. SYNs are a fundamental protocol element which cannot be replaced easily, sender verification is not. -- ciao, Marco
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