SPF, DKIM, DMARC, MX, and CAA configuration
SPF
10
/25
DMARC
16
/30
DKIM
0
/20
MX
/10
CAA
v=spf1 redirect=_spf.strato.com
v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com
smtp.rzone.de.