We have seen extremely large spam campaigns on IPv6 in the past. One thing that may not be obvious to smaller providers, is that larger providers are their own special targets. There are a number of large spammers who spend a lot of effort directly targeting us, and I imagine that's also true for the other large providers. We also see spammers try to use Gmail to spam other providers but avoid spamming Gmail from Gmail.
Generally speaking, outside of the obvious differences, most of our spam rules are agnostic to IPv4/IPv6. Whether or not the ML models have learned to care, I don't know. Of course, "IP reputation" means different things for each, and there may be a bunch of subtleties which creep in because of it. One of the reasons why IPv6 may be treated harsher is it is actually dirtier from our perspective. I know I've investigated small senders at hosting providers in the past where the IPv6 neighborhood had a much lower reputation than the IPv4 neighborhood at the same provider. YMMV Brandon On Tue, Oct 5, 2021 at 5:58 PM Jarland Donnell via mailop <mailop@mailop.org> wrote: > My theory is that it's a side effect of their algorithm's and due to low > adoption they don't consider it a priority to work on. Which would, > admittedly, favor the position of pushing faster adoption. But don't get > me to lying, educated guess is still a guess lol > > On 2021-10-05 19:12, Jay Hennigan via mailop wrote: > > On 10/5/21 12:05, Jarland Donnell via mailop wrote: > >> It's not terrible advice. Google is more likely to filter to spam > >> folder from IPv6 addresses. Enough of us have seen it to know we're > >> putting the puzzle pieces together correctly. > > > > Which on the face of it makes no sense. Spammers, especially those > > using botnets and the like are going to overwhelming use IPv4. > > > > If a typical receiver of email were to disable all spam-filtering on > > IPv6 completely, I don't think they would see a significant increase > > in spam. > > > > So, why is Google putting so much effort into IPv6 spam filtering? > > > > It could be that they anticipate IPv6 adoption and want to get things > > dialed in correctly before the spammers start to pollute the space. If > > so, it's a good thing. > > > > On my personal mail server it did take some work to ensure that all of > > the I's were dotted and the T's crossed but once I got it dialed in > > there hasn't been a problem for me personally sending to Gmail over > > IPv6. And I'm very low volume, like maybe 50 messages a week. > > _______________________________________________ > > mailop mailing list > > mailop@mailop.org > > https://list.mailop.org/listinfo/mailop > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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