> From: Nick Peelman [mailto:n...@peelman.us]
> 
> 104.47.37.131 is not covered under http://spf.protection.outlook.com:
> 
> dig http://spf.protection.outlook.com TXT

Oops, that's wrong ...

dig spf.protection.outlook.com TXT
"v=spf1 ip4:207.46.101.128/26 ip4:207.46.100.0/24 ip4:207.46.163.0/24 
ip4:65.55.169.0/24 ip4:157.56.110.0/23 ip4:157.55.234.0/24 ip4:213.199.154.0/24 
ip4:213.199.180.0/24 include:spfa.protection.outlook.com -all"

dig spfa.protection.outlook.com TXT
"v=spf1 ip4:157.56.112.0/24 ip4:207.46.51.64/26 ip4:157.55.158.0/23 
ip4:64.4.22.64/26 ip4:40.92.0.0/14 ip4:40.107.0.0/17 ip4:40.107.128.0/18 
ip4:134.170.140.0/24 include:spfb.protection.outlook.com -all"

dig spfb.protection.outlook.com TXT
"v=spf1 ip6:2a01:111:f400::/48 ip4:23.103.128.0/19 ip4:23.103.198.0/23 
ip4:65.55.88.0/24 ip4:104.47.0.0/17 ip4:23.103.200.0/21 ip4:23.103.208.0/21 
ip4:23.103.191.0/24 ip4:216.32.180.0/23 ip4:94.245.120.64/26 -all"

So in fact, spf.protection.outlook.com *does* designate the 104.47.0.0/17 IP 
range as permitted sender. Just as Charles pointed out:

            lop...@nedharvey.com designates 104.47.37.131 as permitted sender)


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