Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:_spf.twinq.nl include:_spf.itris.net include:amazonses.com include:spf.email.nl.postex.com include:spf.topdesk.net ip4:20.16.102.20 ip4:185.139.148.31 -all

There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:_spf.twinq.nl include:_spf.itris.net include:amazonses.com include:spf.email.nl.postex.com include:spf.topdesk.net ip4:20.16.102.20 ip4:185.139.148.31 -all.

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