SPF, DKIM, DMARC, MX, and CAA configuration
SPF
18
/25
DMARC
30
/30
DKIM
0
/20
MX
10
/10
CAA
v=spf1 include:_spf-eu.ionos.com ~all
v=DMARC1;p=reject;pct=100;rua=mailto:hostmaster@banananas.de
mx00.ionos.de.
mx01.ionos.de.