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There is 1 domain that have DNS TXT set to v=spf1 mx a include:spf.protection.outlook.com include:spf.sendinblue.com a:mail.regensburg.hosting ip4:5.175.22.212 -all.

Top Domains with TXT set to v=spf1 mx a include:spf.protection.outlook.com include:spf.sendinblue.com a:mail.regensburg.hosting ip4:5.175.22.212 -all