Very helpful feedback Slavko, thank you, I'm sharing with the team here to discuss.
Tom On Mon, Dec 11, 2023 at 11:36 AM Slavko via mailop <mailop@mailop.org> wrote: > Hi, > > Dňa 11. decembra 2023 16:52:43 UTC používateľ Tom Bartel via mailop < > mailop@mailop.org> napísal: > > >Starting March 1, 2024 we will allow up to 10,000 requests per user over a > >30-day time period. After 10,000 requests, users must create a MyValidity > >account to continue using this free service. > > You asked for feedback, here is my opinion about that limit with some > real numbers. > > I have personal MTA, with <100 (usually not more than 50) incoming mails > daily, thus 10 000 checks per 30 days seems OK. In last 30 days i see > ~1 600 accepted mails (not IPs) and ~2 100 rejected mails/IPs and it is > relative peaceful 30 days, I will skip MSA's login attempts counts here, > where DBL can be usefull too, but for usual 30 days that limit will be > enough too. > > But from time to time, i am target of extortion (or so) wave, it is about > 3 000 > unique IPs in 1-2 days. I am able to indentify allmost all of them at first > attempt and fill IPs to firewall, thus only small percentage of them gets > chance to repeat (connect multiple times), usually no more than 3 times > per IP. Thus i will guess about 4 000 DBL requests per one that wave. > > That will result with only 2 (extortion) waves + usual connections per 30 > days, and then my server becomes unprotected by this DBL... > > IMO if you really want to help with security of small (anonymous) MTAs, > that limit should be applied only to NXDOMAIN (not listed)/good reputation > responses, as no one attack's target is able to limit attack volume. > > regards > > > -- > Slavko > https://www.slavino.sk/ > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop > -- Phone: 303.517.9655 Website: https://bartelphoto.com Instagram: https://instagram.com/bartel_photo "Life's most persistent and urgent question is, 'What are you doing for others?'" - Martin Luther King Jr.
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