Domains with DNS TXT v=spf1 include:_spf.duocast.net include:_spf.google.com include:_spf.mailer.twinfield.com +a +mx -all

There is 1 domain that have DNS TXT set to v=spf1 include:_spf.duocast.net include:_spf.google.com include:_spf.mailer.twinfield.com +a +mx -all.

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