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From "Robert - elists" <list...@abbacomm.net>
Subject google netblocks records etc
Date Mon, 02 Jun 2008 19:20:54 GMT
Since they seem to have zillions of outbound mx machines

I did this in response to some email latency issues.

dig google.com txt

google.com.             31      IN      TXT     "v=spf1
include:_netblocks.google.com ~all"

then i

dig _netblocks.google.com txt

_netblocks.google.com.  47      IN      TXT     "v=spf1 ip4:216.239.32.0/19
ip4:64.233.160.0/19 ip4:66.249.80.0/20 ip4:72.14.192.0/18
ip4:209.85.128.0/17 ip4:66.102.0.0/20 ip4:74.125.0.0/16 ip4:64.18.0.0/20
ip4:207.126.144.0/20 ?all"

Are most of you whitelisting these blocks ?

has anyone noticed if these are pretty static or do these TXT records change
frequently or otherwise?

 - rh


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