[Internet-e-architetture-di-rete] su sender policy framework

[Antonio Prado]

On 2/25/20 7:59 PM, sugo via Internet-e-architetture-di-rete wrote:
> Il 2020-02-25 14:48 Antonio Prado via Internet-e-architetture-di-rete ha
> scritto:
>> 1. qual e' la dimostrazione che la rete 216.239.32.0/19 possa inviare
>> e-mail per conto di twitter.com?
> # dig +short txt twitter.com
> "v=spf1 ip4:199.16.156.0/22 ip4:199.59.148.0/22 ip4:8.25.194.0/23
> ip4:8.25.196.0/23 ip4:204.92.114.203 ip4:204.92.114.204/31
> ip4:54.156.255.69 include:_spf.google.com

> verifico la configurazione SPF di _spf.google.com:
> # dig +short txt _spf.google.com
> "v=spf1 include:_netblocks.google.com include:_netblocks2.google.com
> include:_netblocks3.google.com ~all"
> 
> verifico la configurazione SPF di _netblocks.google.com e trovo la
> network cercata:
> 
> # dig +short txt _netblocks.google.com
> "v=spf1 ip4:35.190.247.0/24 ip4:64.233.160.0/19 ip4:66.102.0.0/20
> ip4:66.249.80.0/20 ip4:72.14.192.0/18 ip4:74.125.0.0/16
> ip4:108.177.8.0/21 ip4:173.194.0.0/16 ip4:209.85.128.0/17
> ip4:216.58.192.0/19 ip4:216.239.32.0/19 ~all"

molto bene, siamo ancora entro il limite delle 10 ricorsioni imposto
dalla rfc7208

per le restanti attendo eventuali altri contributi.
grazie
--
antonio

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