Re: [mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine
On Tue, 26 Nov 2019 at 14:30, Benjamin BILLON via mailop wrote: > ItaliaOnline is rolling out new rules, including the necessity of having a > DMARC record (and also a valid DKIM signature), among other things. > I believe those kind of delivery placement (on p=none) is a side effect of > what they're trying to do. UPDATE: sounds like since yesterday everything came back to normal and email are not marked as spam any more for a failed dmarc check with p=none. Now the DMARC header correctly says: "X-IOL-DMARC: fail_monitor con il dominio msn.com" So, I guess you were right and it was an unwanted side effect. Thank you, Stefano ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine
On Tue, 26 Nov 2019 at 14:13, Paul Smith via mailop wrote: > On 26/11/2019 12:41, Stefano Bagnara via mailop wrote: > > I don't know if ItaliaOnLine postmaster follow this list and if they > > consider this new behaviour a feature or a bug, but I wanted to share > > this finding/news with you. > > > > What do you think about this? Do you know other providers making this > > "deliberate guess"? > > It's bad for an ISP to do that. 'p=none' is often used for the case of > "we've just started using DMARC and don't know if we've got it set up > correctly yet", so treating it as p=quarantine is going to lead to lots > of false positives. > > On the other hand, if this is JUST for mail from msn.com, they may have > decided that that domain is established enough that hopefully the admins > know what they're doing, so may have an exception to treat mail FROM > THAT DOMAIN as p=quarantine (similarly with gmail.com, which also has > p=none) My test confirmed it happens also with one of my own domains where I activated p=none as a test. Stefano ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine
ItaliaOnline is rolling out new rules, including the necessity of having a DMARC record (and also a valid DKIM signature), among other things. I believe those kind of delivery placement (on p=none) is a side effect of what they're trying to do. -- Benjamin -Original Message- From: mailop On Behalf Of Paul Smith via mailop Sent: mardi 26 novembre 2019 14:03 To: mailop@mailop.org Subject: Re: [mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine On 26/11/2019 12:41, Stefano Bagnara via mailop wrote: > I don't know if ItaliaOnLine postmaster follow this list and if they > consider this new behaviour a feature or a bug, but I wanted to share > this finding/news with you. > > What do you think about this? Do you know other providers making this > "deliberate guess"? It's bad for an ISP to do that. 'p=none' is often used for the case of "we've just started using DMARC and don't know if we've got it set up correctly yet", so treating it as p=quarantine is going to lead to lots of false positives. On the other hand, if this is JUST for mail from msn.com, they may have decided that that domain is established enough that hopefully the admins know what they're doing, so may have an exception to treat mail FROM THAT DOMAIN as p=quarantine (similarly with gmail.com, which also has p=none) -- Paul Smith Computer Services Tel: 01484 855800 Vat No: GB 685 6987 53 Sign up for news & updates at http://www.pscs.co.uk/go/subscribe ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine
On 26/11/2019 12:41, Stefano Bagnara via mailop wrote: I don't know if ItaliaOnLine postmaster follow this list and if they consider this new behaviour a feature or a bug, but I wanted to share this finding/news with you. What do you think about this? Do you know other providers making this "deliberate guess"? It's bad for an ISP to do that. 'p=none' is often used for the case of "we've just started using DMARC and don't know if we've got it set up correctly yet", so treating it as p=quarantine is going to lead to lots of false positives. On the other hand, if this is JUST for mail from msn.com, they may have decided that that domain is established enough that hopefully the admins know what they're doing, so may have an exception to treat mail FROM THAT DOMAIN as p=quarantine (similarly with gmail.com, which also has p=none) -- Paul Smith Computer Services Tel: 01484 855800 Vat No: GB 685 6987 53 Sign up for news & updates at http://www.pscs.co.uk/go/subscribe ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
[mailop] ItaliaOnLine (@libero.it, +) now interpreting DMARC p=none as p=quarantine
Hi all, We noticed that since 3 days, ItaliaOnLine is delivering to Junk every email failing a DMARC check, even when the sender domain publish a p=none rule. You can check the "reason" in the headers: "X-IOL-DMARC: fail_quarantine con il dominio msn.com" This is expected for p=quarantine rules, but unexpected for p=none rules, but this is happening for msn.com, gmail.com and less common domains using p=none, too, whenever the DMARC check is failed. I don't know if ItaliaOnLine postmaster follow this list and if they consider this new behaviour a feature or a bug, but I wanted to share this finding/news with you. What do you think about this? Do you know other providers making this "deliberate guess"? -- Stefano Bagnara Apache James/jDKIM/jSPF VOXmail/Mosaico.io/VoidLabs ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
