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Top Domains with TXT set to v=spf1 a:dispatch-us.ppe-hosted.com include:spf.protection.outlook.com ip4:208.91.114.151 ip4:107.23.16.222 ip4:54.173.83.138 ip4:52.1.14.157 ip4:107.20.210.250 include:sendgrid.net -all