SPF, DKIM, DMARC, MX, and CAA configuration
SPF
18
/25
DMARC
16
/30
DKIM
0
/20
MX
10
/10
CAA
v=spf1 mx include:amtac.net ~all
v=DMARC1; p=none; rua=mailto:dmarcreports@amtac.net
mail.amtac.net.
mailto:certs@mail.amtac.net
letsencrypt.org