Domains with DNS TXT v=spf1 a include:spf.server-he.de include:spf.hornetsecurity.com include:spf-de.emailsignatures365.com ~all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.server-he.de include:spf.hornetsecurity.com include:spf-de.emailsignatures365.com ~all.