SPF, DKIM, DMARC, MX, and CAA configuration
SPF
18
/25
DMARC
16
/30
DKIM
0
/20
MX
10
/10
CAA
v=spf1 mx a include:ispgateway.de ip4:156.67.172.102 ~all
v=DMARC1; p=none; rua=mailto:log@rudolph-edv.de; fo=1; pct=100
mxlb.ispgateway.de.