[dmarc-discuss] Google & IPv6 SPF check

Franck Martin fmartin at linkedin.com
Fri Jun 8 08:46:18 PDT 2012

Another big point for DMARC, without it it would have taken ages to find this issue.

From: Pradeep Kyasanur <kyasanur at googlers.com<mailto:kyasanur at googlers.com>>
Date: Friday, June 8, 2012 8:36
To: Stef Simoens <stef+dml at bgs.org<mailto:stef+dml at bgs.org>>
Cc: "dmarc-discuss at dmarc.org<mailto:dmarc-discuss at dmarc.org>" <dmarc-discuss at dmarc.org<mailto:dmarc-discuss at dmarc.org>>
Subject: Re: [dmarc-discuss] Google & IPv6 SPF check

Hello Stef,

Thanks for the report. We have identified a bug with our SPF checking in some cases when a record has an A/MX include and that resolves to an IPv6 address. We expect a fix to be out early next week.

On Thu, Jun 7, 2012 at 4:13 PM, Stef Simoens <stef+dml at bgs.org<mailto:stef+dml at bgs.org>> wrote:

I'm not sure if this is the good platform to raise this kind of issues, but I'm sure there are some Google Mail people on this list.

The google.com<http://google.com> reports of June 5th and June 6th show my IPv6 IP as sender, but also reveal that the SPF check failed. E-mails sent with the IPv4 address look OK (SPF check OK).

To my knowledge, my SPF and DNS set-up (domain bgs.org<http://bgs.org>; v=spf1 mx a:claudette.bgs.org<http://claudette.bgs.org> -all; claudette.bgs.org<http://claudette.bgs.org> A / AAAA 2001:41d0:2:30db::207) should work for both IPv4 and IPv6.

Anyone else having the same issue with IPv6?

Kind regards,

Stef Simoens
BGS.org hostmaster
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