Domains with DNS TXT v=spf1 a:mailbox.dena.de ip4:212.1.57.38 include:spf.sec-provider.de include:spf.sendinblue.com -all
There is 1 domain that have DNS TXT set to v=spf1 a:mailbox.dena.de ip4:212.1.57.38 include:spf.sec-provider.de include:spf.sendinblue.com -all.