Gmail MX over IPv6
Olivier MJ Crepin-Leblond
ocl at gih.com
Sun Jun 17 01:03:28 CEST 2012
On 15/06/2012 23:30, Luca BRUNO wrote :
> I'm not sure if it is a recent change or if I have just been
> white-listed, but today in mailserver logs I've spotted that gmail.com
> is already accepting mail over an IPv6 MX:
Yes, but they appear to have "forgotten" googlemail.com which at some
point used to call gmail.
[root at waikiki log]# dig +short mx googlemail.com
[root at waikiki log]# dig +short gmail-smtp-in.l.google.com.
Also -- did anyone check whether it breaks the SPF checking? It appears
that when gmail received email by IPv6, it doesn't recognise the IPv6
address which my mailer uses as a permitted sender, thus spf=softfail
Received-SPF: softfail (google.com: domain of transitioning ocl at gih.com does not designate 2a00:19e8:10:5::b as permitted sender) client-ip=2a00:19e8:10:5::b;
Received-SPF: pass (google.com: domain of ocl at gih.com designates 188.8.131.52 as permitted sender) client-ip=184.108.40.206;
Anyone else with this problem?
Olivier MJ Crépin-Leblond, PhD
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