Gmail spam team got back to me; they have apparently "fixed the problem", which I guess means messages here should stop being marked as spam soon. Because gmail's spam filters are top secret business, I couldn't tell you anything else :) On Fri, 30 Sep 2016 at 17:10 Dave Täht wrote: > > > On 9/30/16 1:37 PM, Neil Shepperd wrote: > > Disabling ipv6 (at least in the mail server, in outgoing direction) is > > probably the easiest option... > > It looks like the simplest thing I could do to allow inbound while > stopping outbound ipv6 would be to: > > /etc/postfix/main.cf: > smtp_bind_address6 = ::1 > > > > I see on most messages here DKIM-Signature headers apparently from > > gmail: "v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com > > ; s=20120113;". These signatures are failing because > > of the added message footer. No sign of a DKIM-Signature > > for lists.bufferbloat.net . You'd need to > > set that up in the list MTA. > > Honestly my "email-fu" has declined considerably in recent years. > Despite the apparent simplicity of this idea, my brain just crashed > multiple times on setting it up with postfix + mailman 2. > > And thank you for poking so deeply into this, I was A) really annoyed by > the bloat-list-as-spam thing and B) clueless. > > > On Fri, 30 Sep 2016 at 15:42 Dave Täht > > wrote: > > > > > > > > On 9/30/16 1:02 AM, Toke Høiland-Jørgensen wrote: > > > Neil Shepperd > > > writes: > > > > > >> I think I have now accumulated enough spam/nonspam classified > emails > > >> to make a statistically signification observation: it seems like > all > > >> emails classified as spam from these lists were send from ipv6: > > >> > > >> SPF: PASS with IP 2600:3c03:0:0:f03c:91ff:fe61:86ce > > >> > > >> All emails from bufferbloat.net lists > > are failing DKIM (because of the > > >> mailing list footer breaking the DKIM signature) which might be > worth > > >> fixing, and failing DMARC because all mailing lists fails DMARC > > >> (however google does not have a strict DMARC policy so that > shouldn't > > >> matter, I hope). > > >> > > >> By the way, it's not just you, either. I have emails from others > on > > >> these lists in my spam folder. > > >> > > >> The distinguishing factor seems to be whether the email was sent > from > > >> the lists.bufferbloat.net ipv6 > > address. Unless this address > > >> corresponds to some kind of tunnel broker possibly also used by > > >> spammers, I can only assume this is some kind of bug (after all, > it > > >> was spf validated so the address shouldn't matter at that point?). > > > > > > Indeed, gmail requires extra measures for IPv6: > > > https://support.google.com/mail/answer/81126 (scroll down to > > "Additional > > > guidelines for IPv6"). > > > > > > Fixing DKIM might be worthwhile :) > > > > But it passes the spf check?? And the reverse lookup is correct. > > > > How about I just disable ipv6? > > > > Have no idea why dkim doesn't work. > > > > > > > > -Toke > > > _______________________________________________ > > > Cake mailing list > > > Cake@lists.bufferbloat.net > > > https://lists.bufferbloat.net/listinfo/cake > > > > > _______________________________________________ > > Cake mailing list > > Cake@lists.bufferbloat.net > > https://lists.bufferbloat.net/listinfo/cake > > >