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On Mon, 2018-07-23 at 15:28 -0700, Kurt Andersen (b) wrote:

> On Mon, Jul 23, 2018 at 3:04 PM, Laura Atkins
> <la...@wordtothewise.com> wrote:

>> Spammers poisoned that particular well a while ago. +all listings
>> are treated as heavily suspicious by ISPs.

> Deeply suspicious or egregiously stupid. Overly broad SPF ranges are
> definitely an indicator of badness of some sort - even /16 is
> considered outrageous.../0 would be more so.

Anyone that uses include:spf.protection.outlook.com will have imported
ip4:52.100.0.0/14 and ip4:40.92.0.0/14


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