Am 04.02.2016 um 18:30 schrieb Alan Hodgson:
On Thursday, February 04, 2016 06:06:14 PM Reindl Harald wrote:before Google ist telling somebody something they should better learn the difference between "~" and "-" in a SPF record to make gmail.com at least on envelope-level spoofing protected i high percentage of spam here would not only have been flagged but outright rejected if they would do their own homework ;; ANSWER SECTION: gmail.com. 300 IN TXT "v=spf1 redirect=_spf.google.com" ;; ANSWER SECTION: _spf.google.com. 300 IN TXT "v=spf1 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com ~all"SPF strict outright breaks mail forwarding, unless the forwarder rewrites the envelope sender
since https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme and gmail it self implements SRS fot their own forwardings that is no excuse
it would possibly reduce the amount of people forwarding their mails from a 10 years old freemail account to a differnt freemail provider with a 5 year old address and from there to their personal domain with the result of procude backscatters all over the world and make a lot of "last-external" rules useless
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