SPF, DKIM, DMARC, MX, and CAA configuration
SPF
18
/25
DMARC
13
/30
DKIM
0
/20
MX
10
/10
CAA
0
/10
v=spf1 include:us._netblocks.mimecast.com mx ip4:63.137.125.38 ip4:65.151.22.230 ip4:69.63.151.0/24 ip4:69.63.150.0/24 ip4:207.250.140.128/25 ip4:205.236.79.0/25 include:_spf.act-on.net include:_spf.google.com include:spf.protection.outlook.com ~allv=DMARC1; p=noneus-smtp-inbound-2.mimecast.com.us-smtp-inbound-1.mimecast.com.