> > http://blog.gmane.org/gmane.os.miros.general/month=20131001 > > WRT the first point in the blog post, Thorsten is incorrect. Google > does publish lists of their outbound IPs via their SPF records. > > ~$ dig txt _netblocks.google.com _netblocks2.google.com
Sure, but how would you reliably whitelist them? We got information directly from a Google lackey that this list may change at any time because of their way to deploy servers, and I have not heard of a way to dynamically whitelist all SPF-allowed MXs in, let's say, postgrey. You can whitelist sender, recipients or client - now, whitelisting a sender domain is not helpful because any domain might be Google hosted. There is, in fact, no reliable lsit of *all* mail hosts that will ever (as in, for a long time in the future) be the sending MTAs of Google-hosted domains. -nik -- <burny> Ein Jabber-Account, sie alle zu finden; ins Dunkel zu treiben und ewig zu binden; im NaturalNet, wo die Schatten droh'n ;)! PGP-Fingerprint: 3C9D 54A4 7575 C026 FB17 FD26 B79A 3C16 A0C4 F296
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